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cmake/Source/cmCoreTryCompile.cxx

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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmCoreTryCompile.h"
#include <cstdio>
#include <cstring>
#include <set>
#include <sstream>
#include <utility>
#include <cm/string_view>
#include <cmext/string_view>
#include "cmsys/Directory.hxx"
#include "cmExportTryCompileFileGenerator.h"
#include "cmGlobalGenerator.h"
#include "cmMakefile.h"
#include "cmMessageType.h"
#include "cmOutputConverter.h"
#include "cmPolicies.h"
#include "cmProperty.h"
#include "cmState.h"
#include "cmStringAlgorithms.h"
#include "cmSystemTools.h"
#include "cmTarget.h"
#include "cmVersion.h"
#include "cmake.h"
namespace {
class LanguageStandardState
{
public:
LanguageStandardState(std::string&& lang)
: IsEnabled(false)
, DidStandard(false)
, DidStandardRequired(false)
, DidExtensions(false)
, StandardFlag(lang + "_STANDARD")
, RequiredFlag(lang + "_STANDARD_REQUIRED")
, ExtensionFlag(lang + "_EXTENSIONS")
{
}
void Enabled(bool isEnabled) { this->IsEnabled = isEnabled; }
bool UpdateIfMatches(std::vector<std::string> const& argv, size_t& index)
{
bool updated = false;
if (argv[index] == this->StandardFlag) {
this->DidStandard = true;
this->StandardValue = argv[++index];
updated = true;
} else if (argv[index] == this->RequiredFlag) {
this->DidStandardRequired = true;
this->RequiredValue = argv[++index];
updated = true;
} else if (argv[index] == this->ExtensionFlag) {
this->DidExtensions = true;
this->ExtensionValue = argv[++index];
updated = true;
}
return updated;
}
bool Validate(cmMakefile* const makefile) const
{
if (this->DidStandard) {
makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmStrCat(this->StandardFlag,
" allowed only in source file signature."));
return false;
}
if (this->DidStandardRequired) {
makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmStrCat(this->RequiredFlag,
" allowed only in source file signature."));
return false;
}
if (this->DidExtensions) {
makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmStrCat(this->ExtensionFlag,
" allowed only in source file signature."));
return false;
}
return true;
}
bool DidNone() const
{
return !this->DidStandard && !this->DidStandardRequired &&
!this->DidExtensions;
}
void LoadUnsetPropertyValues(cmMakefile* const makefile, bool honorStandard,
bool warnCMP0067,
std::vector<std::string>& warnCMP0067Variables)
{
if (!this->IsEnabled) {
return;
}
auto lookupStdVar = [&](std::string const& var) -> std::string {
std::string value = makefile->GetSafeDefinition(var);
if (warnCMP0067 && !value.empty()) {
value.clear();
warnCMP0067Variables.push_back(var);
}
return value;
};
if (honorStandard || warnCMP0067) {
if (!this->DidStandard) {
this->StandardValue =
lookupStdVar(cmStrCat("CMAKE_", this->StandardFlag));
}
if (!this->DidStandardRequired) {
this->RequiredValue =
lookupStdVar(cmStrCat("CMAKE_", this->RequiredFlag));
}
if (!this->DidExtensions) {
this->ExtensionValue =
lookupStdVar(cmStrCat("CMAKE_", this->ExtensionFlag));
}
}
}
void WriteProperties(FILE* fout, std::string const& targetName) const
{
if (!this->IsEnabled) {
return;
}
auto writeProp = [&](std::string const& prop, std::string const& value) {
fprintf(fout, "set_property(TARGET %s PROPERTY %s %s)\n",
targetName.c_str(),
cmOutputConverter::EscapeForCMake(prop).c_str(),
cmOutputConverter::EscapeForCMake(value).c_str());
};
if (!this->StandardValue.empty()) {
writeProp(this->StandardFlag, this->StandardValue);
}
if (!this->RequiredValue.empty()) {
writeProp(this->RequiredFlag, this->RequiredValue);
}
if (!this->ExtensionValue.empty()) {
writeProp(this->ExtensionFlag, this->ExtensionValue);
}
}
private:
bool IsEnabled;
bool DidStandard;
bool DidStandardRequired;
bool DidExtensions;
std::string StandardFlag;
std::string RequiredFlag;
std::string ExtensionFlag;
std::string StandardValue;
std::string RequiredValue;
std::string ExtensionValue;
};
constexpr size_t lang_property_start = 0;
constexpr size_t lang_property_size = 4;
constexpr size_t pie_property_start = 4;
constexpr size_t pie_property_size = 2;
#define SETUP_LANGUAGE(name, lang) \
static const std::string name[lang_property_size + pie_property_size + 1] = \
{ "CMAKE_" #lang "_COMPILER_EXTERNAL_TOOLCHAIN", \
"CMAKE_" #lang "_COMPILER_TARGET", \
"CMAKE_" #lang "_LINK_NO_PIE_SUPPORTED", \
"CMAKE_" #lang "_PIE_SUPPORTED", "" }
// NOLINTNEXTLINE(bugprone-suspicious-missing-comma)
SETUP_LANGUAGE(c_properties, C);
// NOLINTNEXTLINE(bugprone-suspicious-missing-comma)
SETUP_LANGUAGE(cxx_properties, CXX);
// NOLINTNEXTLINE(bugprone-suspicious-missing-comma)
SETUP_LANGUAGE(cuda_properties, CUDA);
// NOLINTNEXTLINE(bugprone-suspicious-missing-comma)
SETUP_LANGUAGE(fortran_properties, Fortran);
// NOLINTNEXTLINE(bugprone-suspicious-missing-comma)
SETUP_LANGUAGE(hip_properties, HIP);
// NOLINTNEXTLINE(bugprone-suspicious-missing-comma)
SETUP_LANGUAGE(objc_properties, OBJC);
// NOLINTNEXTLINE(bugprone-suspicious-missing-comma)
SETUP_LANGUAGE(objcxx_properties, OBJCXX);
// NOLINTNEXTLINE(bugprone-suspicious-missing-comma)
SETUP_LANGUAGE(ispc_properties, ISPC);
// NOLINTNEXTLINE(bugprone-suspicious-missing-comma)
SETUP_LANGUAGE(swift_properties, Swift);
#undef SETUP_LANGUAGE
std::string const kCMAKE_CUDA_ARCHITECTURES = "CMAKE_CUDA_ARCHITECTURES";
std::string const kCMAKE_CUDA_RUNTIME_LIBRARY = "CMAKE_CUDA_RUNTIME_LIBRARY";
std::string const kCMAKE_ENABLE_EXPORTS = "CMAKE_ENABLE_EXPORTS";
std::string const kCMAKE_HIP_ARCHITECTURES = "CMAKE_HIP_ARCHITECTURES";
std::string const kCMAKE_HIP_RUNTIME_LIBRARY = "CMAKE_HIP_RUNTIME_LIBRARY";
std::string const kCMAKE_ISPC_INSTRUCTION_SETS = "CMAKE_ISPC_INSTRUCTION_SETS";
std::string const kCMAKE_ISPC_HEADER_SUFFIX = "CMAKE_ISPC_HEADER_SUFFIX";
std::string const kCMAKE_LINK_SEARCH_END_STATIC =
"CMAKE_LINK_SEARCH_END_STATIC";
std::string const kCMAKE_LINK_SEARCH_START_STATIC =
"CMAKE_LINK_SEARCH_START_STATIC";
std::string const kCMAKE_MSVC_RUNTIME_LIBRARY_DEFAULT =
"CMAKE_MSVC_RUNTIME_LIBRARY_DEFAULT";
std::string const kCMAKE_OSX_ARCHITECTURES = "CMAKE_OSX_ARCHITECTURES";
std::string const kCMAKE_OSX_DEPLOYMENT_TARGET = "CMAKE_OSX_DEPLOYMENT_TARGET";
std::string const kCMAKE_OSX_SYSROOT = "CMAKE_OSX_SYSROOT";
std::string const kCMAKE_APPLE_ARCH_SYSROOTS = "CMAKE_APPLE_ARCH_SYSROOTS";
std::string const kCMAKE_POSITION_INDEPENDENT_CODE =
"CMAKE_POSITION_INDEPENDENT_CODE";
std::string const kCMAKE_SYSROOT = "CMAKE_SYSROOT";
std::string const kCMAKE_SYSROOT_COMPILE = "CMAKE_SYSROOT_COMPILE";
std::string const kCMAKE_SYSROOT_LINK = "CMAKE_SYSROOT_LINK";
std::string const kCMAKE_ARMClang_CMP0123 = "CMAKE_ARMClang_CMP0123";
std::string const kCMAKE_TRY_COMPILE_OSX_ARCHITECTURES =
"CMAKE_TRY_COMPILE_OSX_ARCHITECTURES";
std::string const kCMAKE_TRY_COMPILE_PLATFORM_VARIABLES =
"CMAKE_TRY_COMPILE_PLATFORM_VARIABLES";
std::string const kCMAKE_WARN_DEPRECATED = "CMAKE_WARN_DEPRECATED";
/* GHS Multi platform variables */
std::set<std::string> const ghs_platform_vars{
"GHS_TARGET_PLATFORM", "GHS_PRIMARY_TARGET", "GHS_TOOLSET_ROOT",
"GHS_OS_ROOT", "GHS_OS_DIR", "GHS_BSP_NAME",
"GHS_OS_DIR_OPTION"
};
}
int cmCoreTryCompile::TryCompileCode(std::vector<std::string> const& argv,
bool isTryRun)
{
this->BinaryDirectory = argv[1];
this->OutputFile.clear();
// which signature were we called with ?
this->SrcFileSignature = true;
cmStateEnums::TargetType targetType = cmStateEnums::EXECUTABLE;
cmProp tt = this->Makefile->GetDefinition("CMAKE_TRY_COMPILE_TARGET_TYPE");
if (!isTryRun && cmNonempty(tt)) {
if (*tt == cmState::GetTargetTypeName(cmStateEnums::EXECUTABLE)) {
targetType = cmStateEnums::EXECUTABLE;
} else if (*tt ==
cmState::GetTargetTypeName(cmStateEnums::STATIC_LIBRARY)) {
targetType = cmStateEnums::STATIC_LIBRARY;
} else {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmStrCat("Invalid value '", *tt,
"' for CMAKE_TRY_COMPILE_TARGET_TYPE. Only '",
cmState::GetTargetTypeName(cmStateEnums::EXECUTABLE),
"' and '",
cmState::GetTargetTypeName(cmStateEnums::STATIC_LIBRARY),
"' are allowed."));
return -1;
}
}
std::string sourceDirectory = argv[2];
std::string projectName;
std::string targetName;
std::vector<std::string> cmakeFlags(1, "CMAKE_FLAGS"); // fake argv[0]
std::vector<std::string> compileDefs;
std::string cmakeInternal;
std::string outputVariable;
std::string copyFile;
std::string copyFileError;
LanguageStandardState cState("C");
LanguageStandardState cudaState("CUDA");
LanguageStandardState cxxState("CXX");
LanguageStandardState hipState("HIP");
LanguageStandardState objcState("OBJC");
LanguageStandardState objcxxState("OBJCXX");
std::vector<std::string> targets;
std::vector<std::string> linkOptions;
std::string libsToLink = " ";
bool useOldLinkLibs = true;
char targetNameBuf[64];
bool didOutputVariable = false;
bool didCopyFile = false;
bool didCopyFileError = false;
bool useSources = argv[2] == "SOURCES";
std::vector<std::string> sources;
enum Doing
{
DoingNone,
DoingCMakeFlags,
DoingCompileDefinitions,
DoingLinkOptions,
DoingLinkLibraries,
DoingOutputVariable,
DoingCopyFile,
DoingCopyFileError,
DoingSources,
DoingCMakeInternal
};
Doing doing = useSources ? DoingSources : DoingNone;
for (size_t i = 3; i < argv.size(); ++i) {
if (argv[i] == "CMAKE_FLAGS") {
doing = DoingCMakeFlags;
} else if (argv[i] == "COMPILE_DEFINITIONS") {
doing = DoingCompileDefinitions;
} else if (argv[i] == "LINK_OPTIONS") {
doing = DoingLinkOptions;
} else if (argv[i] == "LINK_LIBRARIES") {
doing = DoingLinkLibraries;
useOldLinkLibs = false;
} else if (argv[i] == "OUTPUT_VARIABLE") {
doing = DoingOutputVariable;
didOutputVariable = true;
} else if (argv[i] == "COPY_FILE") {
doing = DoingCopyFile;
didCopyFile = true;
} else if (argv[i] == "COPY_FILE_ERROR") {
doing = DoingCopyFileError;
didCopyFileError = true;
} else if (cState.UpdateIfMatches(argv, i) ||
cxxState.UpdateIfMatches(argv, i) ||
cudaState.UpdateIfMatches(argv, i) ||
hipState.UpdateIfMatches(argv, i) ||
objcState.UpdateIfMatches(argv, i) ||
objcxxState.UpdateIfMatches(argv, i)) {
continue;
} else if (argv[i] == "__CMAKE_INTERNAL") {
doing = DoingCMakeInternal;
} else if (doing == DoingCMakeFlags) {
cmakeFlags.push_back(argv[i]);
} else if (doing == DoingCompileDefinitions) {
cmExpandList(argv[i], compileDefs);
} else if (doing == DoingLinkOptions) {
linkOptions.push_back(argv[i]);
} else if (doing == DoingLinkLibraries) {
libsToLink += "\"" + cmTrimWhitespace(argv[i]) + "\" ";
if (cmTarget* tgt = this->Makefile->FindTargetToUse(argv[i])) {
switch (tgt->GetType()) {
case cmStateEnums::SHARED_LIBRARY:
case cmStateEnums::STATIC_LIBRARY:
case cmStateEnums::INTERFACE_LIBRARY:
case cmStateEnums::UNKNOWN_LIBRARY:
break;
case cmStateEnums::EXECUTABLE:
if (tgt->IsExecutableWithExports()) {
break;
}
CM_FALLTHROUGH;
default:
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmStrCat("Only libraries may be used as try_compile or try_run "
"IMPORTED LINK_LIBRARIES. Got ",
tgt->GetName(), " of type ",
cmState::GetTargetTypeName(tgt->GetType()), "."));
return -1;
}
if (tgt->IsImported()) {
targets.push_back(argv[i]);
}
}
} else if (doing == DoingOutputVariable) {
outputVariable = argv[i];
doing = DoingNone;
} else if (doing == DoingCopyFile) {
copyFile = argv[i];
doing = DoingNone;
} else if (doing == DoingCopyFileError) {
copyFileError = argv[i];
doing = DoingNone;
} else if (doing == DoingSources) {
sources.push_back(argv[i]);
} else if (doing == DoingCMakeInternal) {
cmakeInternal = argv[i];
doing = DoingNone;
} else if (i == 3) {
this->SrcFileSignature = false;
projectName = argv[i];
} else if (i == 4 && !this->SrcFileSignature) {
targetName = argv[i];
} else {
std::ostringstream m;
m << "try_compile given unknown argument \"" << argv[i] << "\".";
this->Makefile->IssueMessage(MessageType::AUTHOR_WARNING, m.str());
}
}
if (didCopyFile && copyFile.empty()) {
this->Makefile->IssueMessage(MessageType::FATAL_ERROR,
"COPY_FILE must be followed by a file path");
return -1;
}
if (didCopyFileError && copyFileError.empty()) {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
"COPY_FILE_ERROR must be followed by a variable name");
return -1;
}
if (didCopyFileError && !didCopyFile) {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
"COPY_FILE_ERROR may be used only with COPY_FILE");
return -1;
}
if (didOutputVariable && outputVariable.empty()) {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
"OUTPUT_VARIABLE must be followed by a variable name");
return -1;
}
if (useSources && sources.empty()) {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
"SOURCES must be followed by at least one source file");
return -1;
}
if (!this->SrcFileSignature) {
if (!cState.Validate(this->Makefile)) {
return -1;
}
if (!cudaState.Validate(this->Makefile)) {
return -1;
}
if (!hipState.Validate(this->Makefile)) {
return -1;
}
if (!cxxState.Validate(this->Makefile)) {
return -1;
}
if (!objcState.Validate(this->Makefile)) {
return -1;
}
if (!objcxxState.Validate(this->Makefile)) {
return -1;
}
}
// compute the binary dir when TRY_COMPILE is called with a src file
// signature
if (this->SrcFileSignature) {
this->BinaryDirectory += "/CMakeFiles/CMakeTmp";
} else {
// only valid for srcfile signatures
if (!compileDefs.empty()) {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
"COMPILE_DEFINITIONS specified on a srcdir type TRY_COMPILE");
return -1;
}
if (!copyFile.empty()) {
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
"COPY_FILE specified on a srcdir type TRY_COMPILE");
return -1;
}
}
// make sure the binary directory exists
cmSystemTools::MakeDirectory(this->BinaryDirectory);
// do not allow recursive try Compiles
if (this->BinaryDirectory == this->Makefile->GetHomeOutputDirectory()) {
std::ostringstream e;
e << "Attempt at a recursive or nested TRY_COMPILE in directory\n"
<< " " << this->BinaryDirectory << "\n";
this->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
return -1;
}
std::string outFileName = this->BinaryDirectory + "/CMakeLists.txt";
// which signature are we using? If we are using var srcfile bindir
if (this->SrcFileSignature) {
// remove any CMakeCache.txt files so we will have a clean test
std::string ccFile = this->BinaryDirectory + "/CMakeCache.txt";
cmSystemTools::RemoveFile(ccFile);
// Choose sources.
if (!useSources) {
sources.push_back(argv[2]);
}
// Detect languages to enable.
cmGlobalGenerator* gg = this->Makefile->GetGlobalGenerator();
std::set<std::string> testLangs;
for (std::string const& si : sources) {
std::string ext = cmSystemTools::GetFilenameLastExtension(si);
std::string lang = gg->GetLanguageFromExtension(ext.c_str());
if (!lang.empty()) {
testLangs.insert(lang);
} else {
std::ostringstream err;
err << "Unknown extension \"" << ext << "\" for file\n"
<< " " << si << "\n"
<< "try_compile() works only for enabled languages. "
<< "Currently these are:\n ";
std::vector<std::string> langs;
gg->GetEnabledLanguages(langs);
err << cmJoin(langs, " ");
err << "\nSee project() command to enable other languages.";
this->Makefile->IssueMessage(MessageType::FATAL_ERROR, err.str());
return -1;
}
}
// when the only language is ISPC we know that the output
// type must by a static library
if (testLangs.size() == 1 && testLangs.count("ISPC") == 1) {
targetType = cmStateEnums::STATIC_LIBRARY;
}
std::string const tcConfig =
this->Makefile->GetSafeDefinition("CMAKE_TRY_COMPILE_CONFIGURATION");
// we need to create a directory and CMakeLists file etc...
// first create the directories
sourceDirectory = this->BinaryDirectory;
// now create a CMakeLists.txt file in that directory
FILE* fout = cmsys::SystemTools::Fopen(outFileName, "w");
if (!fout) {
std::ostringstream e;
/* clang-format off */
e << "Failed to open\n"
<< " " << outFileName << "\n"
<< cmSystemTools::GetLastSystemError();
/* clang-format on */
this->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str());
return -1;
}
cmProp def = this->Makefile->GetDefinition("CMAKE_MODULE_PATH");
fprintf(fout, "cmake_minimum_required(VERSION %u.%u.%u.%u)\n",
cmVersion::GetMajorVersion(), cmVersion::GetMinorVersion(),
cmVersion::GetPatchVersion(), cmVersion::GetTweakVersion());
if (def) {
fprintf(fout, "set(CMAKE_MODULE_PATH \"%s\")\n", def->c_str());
}
/* Set MSVC runtime library policy to match our selection. */
if (cmProp msvcRuntimeLibraryDefault =
this->Makefile->GetDefinition(kCMAKE_MSVC_RUNTIME_LIBRARY_DEFAULT)) {
fprintf(fout, "cmake_policy(SET CMP0091 %s)\n",
!msvcRuntimeLibraryDefault->empty() ? "NEW" : "OLD");
}
/* Set CUDA architectures policy to match outer project. */
if (this->Makefile->GetPolicyStatus(cmPolicies::CMP0104) !=
cmPolicies::NEW &&
testLangs.find("CUDA") != testLangs.end() &&
this->Makefile->GetSafeDefinition(kCMAKE_CUDA_ARCHITECTURES).empty()) {
fprintf(fout, "cmake_policy(SET CMP0104 OLD)\n");
}
/* Set ARMClang cpu/arch policy to match outer project. */
if (cmProp cmp0123 =
this->Makefile->GetDefinition(kCMAKE_ARMClang_CMP0123)) {
fprintf(fout, "cmake_policy(SET CMP0123 %s)\n",
*cmp0123 == "NEW"_s ? "NEW" : "OLD");
}
/* Set cache/normal variable policy to match outer project.
It may affect toolchain files. */
if (this->Makefile->GetPolicyStatus(cmPolicies::CMP0126) !=
cmPolicies::NEW) {
fprintf(fout, "cmake_policy(SET CMP0126 OLD)\n");
}
std::string projectLangs;
for (std::string const& li : testLangs) {
projectLangs += " " + li;
std::string rulesOverrideBase = "CMAKE_USER_MAKE_RULES_OVERRIDE";
std::string rulesOverrideLang = cmStrCat(rulesOverrideBase, "_", li);
if (cmProp rulesOverridePath =
this->Makefile->GetDefinition(rulesOverrideLang)) {
fprintf(fout, "set(%s \"%s\")\n", rulesOverrideLang.c_str(),
rulesOverridePath->c_str());
} else if (cmProp rulesOverridePath2 =
this->Makefile->GetDefinition(rulesOverrideBase)) {
fprintf(fout, "set(%s \"%s\")\n", rulesOverrideBase.c_str(),
rulesOverridePath2->c_str());
}
}
fprintf(fout, "project(CMAKE_TRY_COMPILE%s)\n", projectLangs.c_str());
if (cmakeInternal == "ABI") {
// This is the ABI detection step, also used for implicit includes.
// Erase any include_directories() calls from the toolchain file so
// that we do not see them as implicit. Our ABI detection source
// does not include any system headers anyway.
fprintf(fout,
"set_property(DIRECTORY PROPERTY INCLUDE_DIRECTORIES \"\")\n");
}
fprintf(fout, "set(CMAKE_VERBOSE_MAKEFILE 1)\n");
for (std::string const& li : testLangs) {
std::string langFlags = "CMAKE_" + li + "_FLAGS";
cmProp flags = this->Makefile->GetDefinition(langFlags);
fprintf(fout, "set(CMAKE_%s_FLAGS %s)\n", li.c_str(),
cmOutputConverter::EscapeForCMake(cmToCStrSafe(flags)).c_str());
fprintf(fout,
"set(CMAKE_%s_FLAGS \"${CMAKE_%s_FLAGS}"
" ${COMPILE_DEFINITIONS}\")\n",
li.c_str(), li.c_str());
}
switch (this->Makefile->GetPolicyStatus(cmPolicies::CMP0066)) {
case cmPolicies::WARN:
if (this->Makefile->PolicyOptionalWarningEnabled(
"CMAKE_POLICY_WARNING_CMP0066")) {
std::ostringstream w;
/* clang-format off */
w << cmPolicies::GetPolicyWarning(cmPolicies::CMP0066) << "\n"
"For compatibility with older versions of CMake, try_compile "
"is not honoring caller config-specific compiler flags "
"(e.g. CMAKE_C_FLAGS_DEBUG) in the test project."
;
/* clang-format on */
this->Makefile->IssueMessage(MessageType::AUTHOR_WARNING, w.str());
}
case cmPolicies::OLD:
// OLD behavior is to do nothing.
break;
case cmPolicies::REQUIRED_IF_USED:
case cmPolicies::REQUIRED_ALWAYS:
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmPolicies::GetRequiredPolicyError(cmPolicies::CMP0066));
CM_FALLTHROUGH;
case cmPolicies::NEW: {
// NEW behavior is to pass config-specific compiler flags.
static std::string const cfgDefault = "DEBUG";
std::string const cfg =
!tcConfig.empty() ? cmSystemTools::UpperCase(tcConfig) : cfgDefault;
for (std::string const& li : testLangs) {
std::string const langFlagsCfg =
cmStrCat("CMAKE_", li, "_FLAGS_", cfg);
cmProp flagsCfg = this->Makefile->GetDefinition(langFlagsCfg);
fprintf(
fout, "set(%s %s)\n", langFlagsCfg.c_str(),
cmOutputConverter::EscapeForCMake(cmToCStrSafe(flagsCfg)).c_str());
}
} break;
}
switch (this->Makefile->GetPolicyStatus(cmPolicies::CMP0056)) {
case cmPolicies::WARN:
if (this->Makefile->PolicyOptionalWarningEnabled(
"CMAKE_POLICY_WARNING_CMP0056")) {
std::ostringstream w;
/* clang-format off */
w << cmPolicies::GetPolicyWarning(cmPolicies::CMP0056) << "\n"
"For compatibility with older versions of CMake, try_compile "
"is not honoring caller link flags (e.g. CMAKE_EXE_LINKER_FLAGS) "
"in the test project."
;
/* clang-format on */
this->Makefile->IssueMessage(MessageType::AUTHOR_WARNING, w.str());
}
case cmPolicies::OLD:
// OLD behavior is to do nothing.
break;
case cmPolicies::REQUIRED_IF_USED:
case cmPolicies::REQUIRED_ALWAYS:
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmPolicies::GetRequiredPolicyError(cmPolicies::CMP0056));
CM_FALLTHROUGH;
case cmPolicies::NEW:
// NEW behavior is to pass linker flags.
{
cmProp exeLinkFlags =
this->Makefile->GetDefinition("CMAKE_EXE_LINKER_FLAGS");
fprintf(fout, "set(CMAKE_EXE_LINKER_FLAGS %s)\n",
cmOutputConverter::EscapeForCMake(cmToCStrSafe(exeLinkFlags))
.c_str());
}
break;
}
fprintf(fout,
"set(CMAKE_EXE_LINKER_FLAGS \"${CMAKE_EXE_LINKER_FLAGS}"
" ${EXE_LINKER_FLAGS}\")\n");
fprintf(fout, "include_directories(${INCLUDE_DIRECTORIES})\n");
fprintf(fout, "set(CMAKE_SUPPRESS_REGENERATION 1)\n");
fprintf(fout, "link_directories(${LINK_DIRECTORIES})\n");
// handle any compile flags we need to pass on
if (!compileDefs.empty()) {
// Pass using bracket arguments to preserve content.
fprintf(fout, "add_definitions([==[%s]==])\n",
cmJoin(compileDefs, "]==] [==[").c_str());
}
/* Use a random file name to avoid rapid creation and deletion
of the same executable name (some filesystems fail on that). */
sprintf(targetNameBuf, "cmTC_%05x", cmSystemTools::RandomSeed() & 0xFFFFF);
targetName = targetNameBuf;
if (!targets.empty()) {
std::string fname = "/" + std::string(targetName) + "Targets.cmake";
cmExportTryCompileFileGenerator tcfg(gg, targets, this->Makefile,
testLangs);
tcfg.SetExportFile((this->BinaryDirectory + fname).c_str());
tcfg.SetConfig(tcConfig);
if (!tcfg.GenerateImportFile()) {
this->Makefile->IssueMessage(MessageType::FATAL_ERROR,
"could not write export file.");
fclose(fout);
return -1;
}
fprintf(fout, "\ninclude(\"${CMAKE_CURRENT_LIST_DIR}/%s\")\n\n",
fname.c_str());
}
// Forward a set of variables to the inner project cache.
{
std::set<std::string> vars;
vars.insert(&c_properties[lang_property_start],
&c_properties[lang_property_start + lang_property_size]);
vars.insert(&cxx_properties[lang_property_start],
&cxx_properties[lang_property_start + lang_property_size]);
vars.insert(&cuda_properties[lang_property_start],
&cuda_properties[lang_property_start + lang_property_size]);
vars.insert(
&fortran_properties[lang_property_start],
&fortran_properties[lang_property_start + lang_property_size]);
vars.insert(&hip_properties[lang_property_start],
&hip_properties[lang_property_start + lang_property_size]);
vars.insert(&objc_properties[lang_property_start],
&objc_properties[lang_property_start + lang_property_size]);
vars.insert(
&objcxx_properties[lang_property_start],
&objcxx_properties[lang_property_start + lang_property_size]);
vars.insert(&ispc_properties[lang_property_start],
&ispc_properties[lang_property_start + lang_property_size]);
vars.insert(&swift_properties[lang_property_start],
&swift_properties[lang_property_start + lang_property_size]);
vars.insert(kCMAKE_CUDA_ARCHITECTURES);
vars.insert(kCMAKE_CUDA_RUNTIME_LIBRARY);
vars.insert(kCMAKE_ENABLE_EXPORTS);
vars.insert(kCMAKE_HIP_ARCHITECTURES);
vars.insert(kCMAKE_HIP_RUNTIME_LIBRARY);
vars.insert(kCMAKE_ISPC_INSTRUCTION_SETS);
vars.insert(kCMAKE_ISPC_HEADER_SUFFIX);
vars.insert(kCMAKE_LINK_SEARCH_END_STATIC);
vars.insert(kCMAKE_LINK_SEARCH_START_STATIC);
vars.insert(kCMAKE_OSX_ARCHITECTURES);
vars.insert(kCMAKE_OSX_DEPLOYMENT_TARGET);
vars.insert(kCMAKE_OSX_SYSROOT);
vars.insert(kCMAKE_APPLE_ARCH_SYSROOTS);
vars.insert(kCMAKE_POSITION_INDEPENDENT_CODE);
vars.insert(kCMAKE_SYSROOT);
vars.insert(kCMAKE_SYSROOT_COMPILE);
vars.insert(kCMAKE_SYSROOT_LINK);
vars.insert(kCMAKE_WARN_DEPRECATED);
vars.emplace("CMAKE_MSVC_RUNTIME_LIBRARY"_s);
if (cmProp varListStr = this->Makefile->GetDefinition(
kCMAKE_TRY_COMPILE_PLATFORM_VARIABLES)) {
std::vector<std::string> varList = cmExpandedList(*varListStr);
vars.insert(varList.begin(), varList.end());
}
if (this->Makefile->GetPolicyStatus(cmPolicies::CMP0083) ==
cmPolicies::NEW) {
// To ensure full support of PIE, propagate cache variables
// driving the link options
vars.insert(&c_properties[pie_property_start],
&c_properties[pie_property_start + pie_property_size]);
vars.insert(&cxx_properties[pie_property_start],
&cxx_properties[pie_property_start + pie_property_size]);
vars.insert(&cuda_properties[pie_property_start],
&cuda_properties[pie_property_start + pie_property_size]);
vars.insert(
&fortran_properties[pie_property_start],
&fortran_properties[pie_property_start + pie_property_size]);
vars.insert(&hip_properties[pie_property_start],
&hip_properties[pie_property_start + pie_property_size]);
vars.insert(&objc_properties[pie_property_start],
&objc_properties[pie_property_start + pie_property_size]);
vars.insert(
&objcxx_properties[pie_property_start],
&objcxx_properties[pie_property_start + pie_property_size]);
vars.insert(&ispc_properties[pie_property_start],
&ispc_properties[pie_property_start + pie_property_size]);
vars.insert(&swift_properties[pie_property_start],
&swift_properties[pie_property_start + pie_property_size]);
}
/* for the TRY_COMPILEs we want to be able to specify the architecture.
So the user can set CMAKE_OSX_ARCHITECTURES to i386;ppc and then set
CMAKE_TRY_COMPILE_OSX_ARCHITECTURES first to i386 and then to ppc to
have the tests run for each specific architecture. Since
cmLocalGenerator doesn't allow building for "the other"
architecture only via CMAKE_OSX_ARCHITECTURES.
*/
if (cmProp tcArchs = this->Makefile->GetDefinition(
kCMAKE_TRY_COMPILE_OSX_ARCHITECTURES)) {
vars.erase(kCMAKE_OSX_ARCHITECTURES);
std::string flag = "-DCMAKE_OSX_ARCHITECTURES=" + *tcArchs;
cmakeFlags.push_back(std::move(flag));
}
for (std::string const& var : vars) {
if (cmProp val = this->Makefile->GetDefinition(var)) {
std::string flag = "-D" + var + "=" + *val;
cmakeFlags.push_back(std::move(flag));
}
}
}
/* Set the appropriate policy information for ENABLE_EXPORTS */
fprintf(fout, "cmake_policy(SET CMP0065 %s)\n",
this->Makefile->GetPolicyStatus(cmPolicies::CMP0065) ==
cmPolicies::NEW
? "NEW"
: "OLD");
/* Set the appropriate policy information for PIE link flags */
fprintf(fout, "cmake_policy(SET CMP0083 %s)\n",
this->Makefile->GetPolicyStatus(cmPolicies::CMP0083) ==
cmPolicies::NEW
? "NEW"
: "OLD");
if (targetType == cmStateEnums::EXECUTABLE) {
/* Put the executable at a known location (for COPY_FILE). */
fprintf(fout, "set(CMAKE_RUNTIME_OUTPUT_DIRECTORY \"%s\")\n",
this->BinaryDirectory.c_str());
/* Create the actual executable. */
fprintf(fout, "add_executable(%s", targetName.c_str());
} else // if (targetType == cmStateEnums::STATIC_LIBRARY)
{
/* Put the static library at a known location (for COPY_FILE). */
fprintf(fout, "set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY \"%s\")\n",
this->BinaryDirectory.c_str());
/* Create the actual static library. */
fprintf(fout, "add_library(%s STATIC", targetName.c_str());
}
for (std::string const& si : sources) {
fprintf(fout, " \"%s\"", si.c_str());
// Add dependencies on any non-temporary sources.
if (si.find("CMakeTmp") == std::string::npos) {
this->Makefile->AddCMakeDependFile(si);
}
}
fprintf(fout, ")\n");
cState.Enabled(testLangs.find("C") != testLangs.end());
cxxState.Enabled(testLangs.find("CXX") != testLangs.end());
cudaState.Enabled(testLangs.find("CUDA") != testLangs.end());
hipState.Enabled(testLangs.find("HIP") != testLangs.end());
objcState.Enabled(testLangs.find("OBJC") != testLangs.end());
objcxxState.Enabled(testLangs.find("OBJCXX") != testLangs.end());
bool warnCMP0067 = false;
bool honorStandard = true;
if (cState.DidNone() && cxxState.DidNone() && objcState.DidNone() &&
objcxxState.DidNone() && cudaState.DidNone() && hipState.DidNone()) {
switch (this->Makefile->GetPolicyStatus(cmPolicies::CMP0067)) {
case cmPolicies::WARN:
warnCMP0067 = this->Makefile->PolicyOptionalWarningEnabled(
"CMAKE_POLICY_WARNING_CMP0067");
CM_FALLTHROUGH;
case cmPolicies::OLD:
// OLD behavior is to not honor the language standard variables.
honorStandard = false;
break;
case cmPolicies::REQUIRED_IF_USED:
case cmPolicies::REQUIRED_ALWAYS:
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmPolicies::GetRequiredPolicyError(cmPolicies::CMP0067));
case cmPolicies::NEW:
// NEW behavior is to honor the language standard variables.
// We already initialized honorStandard to true.
break;
}
}
std::vector<std::string> warnCMP0067Variables;
cState.LoadUnsetPropertyValues(this->Makefile, honorStandard, warnCMP0067,
warnCMP0067Variables);
cxxState.LoadUnsetPropertyValues(this->Makefile, honorStandard,
warnCMP0067, warnCMP0067Variables);
cudaState.LoadUnsetPropertyValues(this->Makefile, honorStandard,
warnCMP0067, warnCMP0067Variables);
hipState.LoadUnsetPropertyValues(this->Makefile, honorStandard,
warnCMP0067, warnCMP0067Variables);
objcState.LoadUnsetPropertyValues(this->Makefile, honorStandard,
warnCMP0067, warnCMP0067Variables);
objcxxState.LoadUnsetPropertyValues(this->Makefile, honorStandard,
warnCMP0067, warnCMP0067Variables);
if (!warnCMP0067Variables.empty()) {
std::ostringstream w;
/* clang-format off */
w << cmPolicies::GetPolicyWarning(cmPolicies::CMP0067) << "\n"
"For compatibility with older versions of CMake, try_compile "
"is not honoring language standard variables in the test project:\n"
;
/* clang-format on */
for (std::string const& vi : warnCMP0067Variables) {
w << " " << vi << "\n";
}
this->Makefile->IssueMessage(MessageType::AUTHOR_WARNING, w.str());
}
cState.WriteProperties(fout, targetName);
cxxState.WriteProperties(fout, targetName);
cudaState.WriteProperties(fout, targetName);
hipState.WriteProperties(fout, targetName);
objcState.WriteProperties(fout, targetName);
objcxxState.WriteProperties(fout, targetName);
if (!linkOptions.empty()) {
std::vector<std::string> options;
options.reserve(linkOptions.size());
for (const auto& option : linkOptions) {
options.emplace_back(cmOutputConverter::EscapeForCMake(option));
}
if (targetType == cmStateEnums::STATIC_LIBRARY) {
fprintf(fout,
"set_property(TARGET %s PROPERTY STATIC_LIBRARY_OPTIONS %s)\n",
targetName.c_str(), cmJoin(options, " ").c_str());
} else {
fprintf(fout, "target_link_options(%s PRIVATE %s)\n",
targetName.c_str(), cmJoin(options, " ").c_str());
}
}
if (useOldLinkLibs) {
fprintf(fout, "target_link_libraries(%s ${LINK_LIBRARIES})\n",
targetName.c_str());
} else {
fprintf(fout, "target_link_libraries(%s %s)\n", targetName.c_str(),
libsToLink.c_str());
}
fclose(fout);
projectName = "CMAKE_TRY_COMPILE";
}
if (this->Makefile->GetState()->UseGhsMultiIDE()) {
// Forward the GHS variables to the inner project cache.
for (std::string const& var : ghs_platform_vars) {
if (cmProp val = this->Makefile->GetDefinition(var)) {
std::string flag = "-D" + var + "=" + "'" + *val + "'";
cmakeFlags.push_back(std::move(flag));
}
}
}
bool erroroc = cmSystemTools::GetErrorOccuredFlag();
cmSystemTools::ResetErrorOccuredFlag();
std::string output;
// actually do the try compile now that everything is setup
int res = this->Makefile->TryCompile(
sourceDirectory, this->BinaryDirectory, projectName, targetName,
this->SrcFileSignature, cmake::NO_BUILD_PARALLEL_LEVEL, &cmakeFlags,
output);
if (erroroc) {
cmSystemTools::SetErrorOccured();
}
// set the result var to the return value to indicate success or failure
this->Makefile->AddCacheDefinition(argv[0], (res == 0 ? "TRUE" : "FALSE"),
"Result of TRY_COMPILE",
cmStateEnums::INTERNAL);
if (!outputVariable.empty()) {
this->Makefile->AddDefinition(outputVariable, output);
}
if (this->SrcFileSignature) {
std::string copyFileErrorMessage;
this->FindOutputFile(targetName, targetType);
if ((res == 0) && !copyFile.empty()) {
if (this->OutputFile.empty() ||
!cmSystemTools::CopyFileAlways(this->OutputFile, copyFile)) {
std::ostringstream emsg;
/* clang-format off */
emsg << "Cannot copy output executable\n"
<< " '" << this->OutputFile << "'\n"
<< "to destination specified by COPY_FILE:\n"
<< " '" << copyFile << "'\n";
/* clang-format on */
if (!this->FindErrorMessage.empty()) {
emsg << this->FindErrorMessage;
}
if (copyFileError.empty()) {
this->Makefile->IssueMessage(MessageType::FATAL_ERROR, emsg.str());
return -1;
}
copyFileErrorMessage = emsg.str();
}
}
if (!copyFileError.empty()) {
this->Makefile->AddDefinition(copyFileError, copyFileErrorMessage);
}
}
return res;
}
void cmCoreTryCompile::CleanupFiles(std::string const& binDir)
{
if (binDir.empty()) {
return;
}
if (binDir.find("CMakeTmp") == std::string::npos) {
cmSystemTools::Error(
"TRY_COMPILE attempt to remove -rf directory that does not contain "
"CMakeTmp:" +
binDir);
return;
}
cmsys::Directory dir;
dir.Load(binDir);
std::set<std::string> deletedFiles;
for (unsigned long i = 0; i < dir.GetNumberOfFiles(); ++i) {
const char* fileName = dir.GetFile(i);
if (strcmp(fileName, ".") != 0 && strcmp(fileName, "..") != 0 &&
// Do not delete NFS temporary files.
!cmHasPrefix(fileName, ".nfs")) {
if (deletedFiles.insert(fileName).second) {
std::string const fullPath =
std::string(binDir).append("/").append(fileName);
if (cmSystemTools::FileIsSymlink(fullPath)) {
cmSystemTools::RemoveFile(fullPath);
} else if (cmSystemTools::FileIsDirectory(fullPath)) {
this->CleanupFiles(fullPath);
cmSystemTools::RemoveADirectory(fullPath);
} else {
#ifdef _WIN32
// Sometimes anti-virus software hangs on to new files so we
// cannot delete them immediately. Try a few times.
cmSystemTools::WindowsFileRetry retry =
cmSystemTools::GetWindowsFileRetry();
cmsys::Status status;
while (!((status = cmSystemTools::RemoveFile(fullPath))) &&
--retry.Count && cmSystemTools::FileExists(fullPath)) {
cmSystemTools::Delay(retry.Delay);
}
if (retry.Count == 0)
#else
cmsys::Status status = cmSystemTools::RemoveFile(fullPath);
if (!status)
#endif
{
this->Makefile->IssueMessage(
MessageType::FATAL_ERROR,
cmStrCat("The file:\n ", fullPath,
"\ncould not be removed:\n ", status.GetString()));
}
}
}
}
}
}
void cmCoreTryCompile::FindOutputFile(const std::string& targetName,
cmStateEnums::TargetType targetType)
{
this->FindErrorMessage.clear();
this->OutputFile.clear();
std::string tmpOutputFile = "/";
if (targetType == cmStateEnums::EXECUTABLE) {
tmpOutputFile += targetName;
tmpOutputFile +=
this->Makefile->GetSafeDefinition("CMAKE_EXECUTABLE_SUFFIX");
} else // if (targetType == cmStateEnums::STATIC_LIBRARY)
{
tmpOutputFile +=
this->Makefile->GetSafeDefinition("CMAKE_STATIC_LIBRARY_PREFIX");
tmpOutputFile += targetName;
tmpOutputFile +=
this->Makefile->GetSafeDefinition("CMAKE_STATIC_LIBRARY_SUFFIX");
}
// a list of directories where to search for the compilation result
// at first directly in the binary dir
std::vector<std::string> searchDirs;
searchDirs.emplace_back();
cmProp config =
this->Makefile->GetDefinition("CMAKE_TRY_COMPILE_CONFIGURATION");
// if a config was specified try that first
if (cmNonempty(config)) {
std::string tmp = cmStrCat('/', *config);
searchDirs.push_back(std::move(tmp));
}
searchDirs.emplace_back("/Debug");
#if defined(__APPLE__)
std::string app = "/" + targetName + ".app";
if (cmNonempty(config)) {
std::string tmp = cmStrCat('/', *config, app);
searchDirs.push_back(std::move(tmp));
}
std::string tmp = "/Debug" + app;
searchDirs.emplace_back(std::move(tmp));
searchDirs.push_back(std::move(app));
#endif
searchDirs.emplace_back("/Development");
for (std::string const& sdir : searchDirs) {
std::string command = cmStrCat(this->BinaryDirectory, sdir, tmpOutputFile);
if (cmSystemTools::FileExists(command)) {
this->OutputFile = cmSystemTools::CollapseFullPath(command);
return;
}
}
std::ostringstream emsg;
emsg << "Unable to find the executable at any of:\n";
emsg << cmWrap(" " + this->BinaryDirectory, searchDirs, tmpOutputFile, "\n")
<< "\n";
this->FindErrorMessage = emsg.str();
}
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