diff options
19 files changed, 185 insertions, 12 deletions
diff --git a/Help/manual/cmake-generator-expressions.7.rst b/Help/manual/cmake-generator-expressions.7.rst index c47a7c4..b1b1102 100644 --- a/Help/manual/cmake-generator-expressions.7.rst +++ b/Help/manual/cmake-generator-expressions.7.rst @@ -93,6 +93,32 @@ Available logical expressions are: for the 'head' target, an error is reported. See the :manual:`cmake-compile-features(7)` manual for information on compile features. +``$<COMPILE_LANGUAGE:lang>`` + ``1`` when the language used for compilation unit matches ``lang``, + otherwise ``0``. This expression used to specify compile options for + source files of a particular language in a target. For example, to specify + the use of the ``-fno-exceptions`` compile option (compiler id checks + elided): + + .. code-block:: cmake + + add_executable(myapp main.cpp foo.c bar.cpp) + target_compile_options(myapp + PRIVATE $<$<COMPILE_LANGUAGE:CXX>:-fno-exceptions> + ) + + This generator expression has limited use because it is not possible to + use it with the Visual Studio generators. Portable buildsystems would + not use this expression, and would create separate libraries for each + source file language instead: + + .. code-block:: cmake + + add_library(myapp_c foo.c) + add_library(myapp_cxx foo.c) + target_compile_options(myapp_cxx PUBLIC -fno-exceptions) + add_executable(myapp main.cpp) + target_link_libraries(myapp myapp_c myapp_cxx) Informational Expressions ========================= @@ -174,6 +200,10 @@ Available informational expressions are: ``$<INSTALL_PREFIX>`` Content of the install prefix when the target is exported via :command:`install(EXPORT)` and empty otherwise. +``$<COMPILE_LANGUAGE>`` + The compile language of source files when evaluating compile options. See + the unary version for notes about portability of this generator + expression. Output Expressions ================== diff --git a/Source/cmGeneratorExpressionEvaluator.cxx b/Source/cmGeneratorExpressionEvaluator.cxx index 63a46f2..6a9f251 100644 --- a/Source/cmGeneratorExpressionEvaluator.cxx +++ b/Source/cmGeneratorExpressionEvaluator.cxx @@ -827,6 +827,40 @@ static const struct CompileLanguageNode : public cmGeneratorExpressionNode "components of the file(GENERATE) command."); return std::string(); } + + std::vector<std::string> enabledLanguages; + cmGlobalGenerator* gg + = context->Makefile->GetLocalGenerator()->GetGlobalGenerator(); + gg->GetEnabledLanguages(enabledLanguages); + if (!parameters.empty() && + std::find(enabledLanguages.begin(), enabledLanguages.end(), + parameters.front()) == enabledLanguages.end()) + { + reportError(context, content->GetOriginalExpression(), + "$<COMPILE_LANGUAGE:...> Unknown language."); + return std::string(); + } + + std::string genName = gg->GetName(); + if (genName.find("Visual Studio") != std::string::npos) + { + reportError(context, content->GetOriginalExpression(), + "$<COMPILE_LANGUAGE:...> may not be used with Visual Studio " + "generators."); + return std::string(); + } + else + { + if(genName.find("Makefiles") == std::string::npos && + genName.find("Ninja") == std::string::npos && + genName.find("Watcom WMake") == std::string::npos && + genName.find("Xcode") == std::string::npos) + { + reportError(context, content->GetOriginalExpression(), + "$<COMPILE_LANGUAGE:...> not supported for this generator."); + return std::string(); + } + } if (parameters.empty()) { return context->Language; diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx index 7c83f27..be82085 100644 --- a/Source/cmLocalGenerator.cxx +++ b/Source/cmLocalGenerator.cxx @@ -1453,7 +1453,7 @@ void cmLocalGenerator::AddCompileOptions( { cmSystemTools::ParseWindowsCommandLine(targetFlags, opts); } - target->GetCompileOptions(opts, config); + target->GetCompileOptions(opts, config, lang); for(std::vector<std::string>::const_iterator i = opts.begin(); i != opts.end(); ++i) { @@ -1474,7 +1474,7 @@ void cmLocalGenerator::AddCompileOptions( this->AppendFlags(flags, targetFlags); } std::vector<std::string> opts; - target->GetCompileOptions(opts, config); + target->GetCompileOptions(opts, config, lang); for(std::vector<std::string>::const_iterator i = opts.begin(); i != opts.end(); ++i) { diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx index e046bef..c54d694 100644 --- a/Source/cmTarget.cxx +++ b/Source/cmTarget.cxx @@ -2192,7 +2192,8 @@ static void processCompileOptionsInternal(cmTarget const* tgt, std::vector<std::string> &options, UNORDERED_SET<std::string> &uniqueOptions, cmGeneratorExpressionDAGChecker *dagChecker, - const std::string& config, bool debugOptions, const char *logName) + const std::string& config, bool debugOptions, const char *logName, + std::string const& language) { cmMakefile *mf = tgt->GetMakefile(); @@ -2204,7 +2205,8 @@ static void processCompileOptionsInternal(cmTarget const* tgt, config, false, tgt, - dagChecker), + dagChecker, + language), entryOptions); std::string usedOptions; for(std::vector<std::string>::iterator @@ -2238,10 +2240,12 @@ static void processCompileOptions(cmTarget const* tgt, std::vector<std::string> &options, UNORDERED_SET<std::string> &uniqueOptions, cmGeneratorExpressionDAGChecker *dagChecker, - const std::string& config, bool debugOptions) + const std::string& config, bool debugOptions, + std::string const& language) { processCompileOptionsInternal(tgt, entries, options, uniqueOptions, - dagChecker, config, debugOptions, "options"); + dagChecker, config, debugOptions, "options", + language); } //---------------------------------------------------------------------------- @@ -2271,7 +2275,8 @@ void cmTarget::GetAutoUicOptions(std::vector<std::string> &result, //---------------------------------------------------------------------------- void cmTarget::GetCompileOptions(std::vector<std::string> &result, - const std::string& config) const + const std::string& config, + const std::string& language) const { UNORDERED_SET<std::string> uniqueOptions; @@ -2303,7 +2308,8 @@ void cmTarget::GetCompileOptions(std::vector<std::string> &result, uniqueOptions, &dagChecker, config, - debugOptions); + debugOptions, + language); std::vector<cmTargetInternals::TargetPropertyEntry*> linkInterfaceCompileOptionsEntries; @@ -2318,7 +2324,8 @@ void cmTarget::GetCompileOptions(std::vector<std::string> &result, uniqueOptions, &dagChecker, config, - debugOptions); + debugOptions, + language); deleteAndClear(linkInterfaceCompileOptionsEntries); } @@ -2333,7 +2340,7 @@ static void processCompileDefinitions(cmTarget const* tgt, { processCompileOptionsInternal(tgt, entries, options, uniqueOptions, dagChecker, config, debugOptions, - "definitions"); + "definitions", std::string()); } //---------------------------------------------------------------------------- @@ -2431,7 +2438,8 @@ static void processCompileFeatures(cmTarget const* tgt, const std::string& config, bool debugOptions) { processCompileOptionsInternal(tgt, entries, options, uniqueOptions, - dagChecker, config, debugOptions, "features"); + dagChecker, config, debugOptions, "features", + std::string()); } //---------------------------------------------------------------------------- diff --git a/Source/cmTarget.h b/Source/cmTarget.h index ddd9859..56db22e 100644 --- a/Source/cmTarget.h +++ b/Source/cmTarget.h @@ -577,7 +577,8 @@ public: void AppendBuildInterfaceIncludes(); void GetCompileOptions(std::vector<std::string> &result, - const std::string& config) const; + const std::string& config, + const std::string& language) const; void GetAutoUicOptions(std::vector<std::string> &result, const std::string& config) const; void GetCompileFeatures(std::vector<std::string> &features, diff --git a/Tests/CMakeCommands/target_compile_options/CMakeLists.txt b/Tests/CMakeCommands/target_compile_options/CMakeLists.txt index 1d04639..35dd276 100644 --- a/Tests/CMakeCommands/target_compile_options/CMakeLists.txt +++ b/Tests/CMakeCommands/target_compile_options/CMakeLists.txt @@ -23,6 +23,21 @@ add_executable(consumer "${CMAKE_CURRENT_SOURCE_DIR}/consumer.cpp" ) +if (NOT CMAKE_GENERATOR MATCHES "Visual Studio") + target_sources(consumer PRIVATE + "${CMAKE_CURRENT_SOURCE_DIR}/consumer.c" + ) + target_compile_options(consumer + PRIVATE + -DCONSUMER_LANG_$<COMPILE_LANGUAGE> + -DLANG_IS_CXX=$<COMPILE_LANGUAGE:CXX> + -DLANG_IS_C=$<COMPILE_LANGUAGE:C> + ) + target_compile_definitions(consumer + PRIVATE -DTEST_LANG_DEFINES + ) +endif() + target_compile_options(consumer PRIVATE $<$<CXX_COMPILER_ID:GNU>:$<TARGET_PROPERTY:target_compile_options,INTERFACE_COMPILE_OPTIONS>> ) diff --git a/Tests/CMakeCommands/target_compile_options/consumer.c b/Tests/CMakeCommands/target_compile_options/consumer.c new file mode 100644 index 0000000..5796d96 --- /dev/null +++ b/Tests/CMakeCommands/target_compile_options/consumer.c @@ -0,0 +1,23 @@ + +#ifdef TEST_LANG_DEFINES + #ifdef CONSUMER_LANG_CXX + #error Unexpected CONSUMER_LANG_CXX + #endif + + #ifndef CONSUMER_LANG_C + #error Expected CONSUMER_LANG_C + #endif + + #if !LANG_IS_C + #error Expected LANG_IS_C + #endif + + #if LANG_IS_CXX + #error Unexpected LANG_IS_CXX + #endif +#endif + +void consumer_c() +{ + +} diff --git a/Tests/CMakeCommands/target_compile_options/consumer.cpp b/Tests/CMakeCommands/target_compile_options/consumer.cpp index 1299606..c5882a5 100644 --- a/Tests/CMakeCommands/target_compile_options/consumer.cpp +++ b/Tests/CMakeCommands/target_compile_options/consumer.cpp @@ -15,4 +15,22 @@ #endif +#ifdef TEST_LANG_DEFINES + #ifndef CONSUMER_LANG_CXX + #error Expected CONSUMER_LANG_CXX + #endif + + #ifdef CONSUMER_LANG_C + #error Unexpected CONSUMER_LANG_C + #endif + + #if !LANG_IS_CXX + #error Expected LANG_IS_CXX + #endif + + #if LANG_IS_C + #error Unexpected LANG_IS_C + #endif +#endif + int main() { return 0; } diff --git a/Tests/RunCMake/CMakeLists.txt b/Tests/RunCMake/CMakeLists.txt index eb42057..9f1256e 100644 --- a/Tests/RunCMake/CMakeLists.txt +++ b/Tests/RunCMake/CMakeLists.txt @@ -208,3 +208,5 @@ add_RunCMake_test(IfacePaths_SOURCES TEST_DIR IfacePaths) if(RPMBUILD_EXECUTABLE) add_RunCMake_test(CPackRPM) endif() + +add_RunCMake_test(COMPILE_LANGUAGE-genex) diff --git a/Tests/RunCMake/COMPILE_LANGUAGE-genex/CMakeLists.txt b/Tests/RunCMake/COMPILE_LANGUAGE-genex/CMakeLists.txt new file mode 100644 index 0000000..ef2163c --- /dev/null +++ b/Tests/RunCMake/COMPILE_LANGUAGE-genex/CMakeLists.txt @@ -0,0 +1,3 @@ +cmake_minimum_required(VERSION 3.1) +project(${RunCMake_TEST} NONE) +include(${RunCMake_TEST}.cmake) diff --git a/Tests/RunCMake/COMPILE_LANGUAGE-genex/CompileOptions-result.txt b/Tests/RunCMake/COMPILE_LANGUAGE-genex/CompileOptions-result.txt new file mode 100644 index 0000000..d00491f --- /dev/null +++ b/Tests/RunCMake/COMPILE_LANGUAGE-genex/CompileOptions-result.txt @@ -0,0 +1 @@ +1 diff --git a/Tests/RunCMake/COMPILE_LANGUAGE-genex/CompileOptions-stderr-VS.txt b/Tests/RunCMake/COMPILE_LANGUAGE-genex/CompileOptions-stderr-VS.txt new file mode 100644 index 0000000..e9e8e9f --- /dev/null +++ b/Tests/RunCMake/COMPILE_LANGUAGE-genex/CompileOptions-stderr-VS.txt @@ -0,0 +1,8 @@ +CMake Error at CompileOptions.cmake:5 \(target_compile_options\): + Error evaluating generator expression: + + \$<COMPILE_LANGUAGE:CXX> + + \$<COMPILE_LANGUAGE:...> may not be used with Visual Studio generators. +Call Stack \(most recent call first\): + CMakeLists.txt:3 \(include\) diff --git a/Tests/RunCMake/COMPILE_LANGUAGE-genex/CompileOptions.cmake b/Tests/RunCMake/COMPILE_LANGUAGE-genex/CompileOptions.cmake new file mode 100644 index 0000000..6c92abc --- /dev/null +++ b/Tests/RunCMake/COMPILE_LANGUAGE-genex/CompileOptions.cmake @@ -0,0 +1,5 @@ + +enable_language(CXX) + +add_executable(main main.cpp) +target_compile_options(main PRIVATE $<$<COMPILE_LANGUAGE:CXX>:-DANYTHING>) diff --git a/Tests/RunCMake/COMPILE_LANGUAGE-genex/RunCMakeTest.cmake b/Tests/RunCMake/COMPILE_LANGUAGE-genex/RunCMakeTest.cmake new file mode 100644 index 0000000..2c5d9ae --- /dev/null +++ b/Tests/RunCMake/COMPILE_LANGUAGE-genex/RunCMakeTest.cmake @@ -0,0 +1,6 @@ +include(RunCMake) + +if (RunCMake_GENERATOR MATCHES "Visual Studio") + set(RunCMake-stderr-file CompileOptions-stderr-VS.txt) + run_cmake(CompileOptions) +endif() diff --git a/Tests/RunCMake/COMPILE_LANGUAGE-genex/main.cpp b/Tests/RunCMake/COMPILE_LANGUAGE-genex/main.cpp new file mode 100644 index 0000000..31a1337 --- /dev/null +++ b/Tests/RunCMake/COMPILE_LANGUAGE-genex/main.cpp @@ -0,0 +1,5 @@ + +int main() +{ + return 0; +} diff --git a/Tests/RunCMake/GeneratorExpression/COMPILE_LANGUAGE-unknown-lang-result.txt b/Tests/RunCMake/GeneratorExpression/COMPILE_LANGUAGE-unknown-lang-result.txt new file mode 100644 index 0000000..d00491f --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/COMPILE_LANGUAGE-unknown-lang-result.txt @@ -0,0 +1 @@ +1 diff --git a/Tests/RunCMake/GeneratorExpression/COMPILE_LANGUAGE-unknown-lang-stderr.txt b/Tests/RunCMake/GeneratorExpression/COMPILE_LANGUAGE-unknown-lang-stderr.txt new file mode 100644 index 0000000..444da45 --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/COMPILE_LANGUAGE-unknown-lang-stderr.txt @@ -0,0 +1,8 @@ +CMake Error at COMPILE_LANGUAGE-unknown-lang.cmake:4 \(target_compile_options\): + Error evaluating generator expression: + + \$<COMPILE_LANGUAGE:CXX> + + \$<COMPILE_LANGUAGE:...> Unknown language. +Call Stack \(most recent call first\): + CMakeLists.txt:3 \(include\) diff --git a/Tests/RunCMake/GeneratorExpression/COMPILE_LANGUAGE-unknown-lang.cmake b/Tests/RunCMake/GeneratorExpression/COMPILE_LANGUAGE-unknown-lang.cmake new file mode 100644 index 0000000..cec12a3 --- /dev/null +++ b/Tests/RunCMake/GeneratorExpression/COMPILE_LANGUAGE-unknown-lang.cmake @@ -0,0 +1,4 @@ + +enable_language(C) +add_executable(empty empty.c) +target_compile_options(empty PRIVATE $<$<COMPILE_LANGUAGE:CXX>:-Wall>) diff --git a/Tests/RunCMake/GeneratorExpression/RunCMakeTest.cmake b/Tests/RunCMake/GeneratorExpression/RunCMakeTest.cmake index f591c3d..542b7fc 100644 --- a/Tests/RunCMake/GeneratorExpression/RunCMakeTest.cmake +++ b/Tests/RunCMake/GeneratorExpression/RunCMakeTest.cmake @@ -23,6 +23,7 @@ run_cmake(COMPILE_LANGUAGE-target_sources) run_cmake(COMPILE_LANGUAGE-add_executable) run_cmake(COMPILE_LANGUAGE-add_library) run_cmake(COMPILE_LANGUAGE-add_test) +run_cmake(COMPILE_LANGUAGE-unknown-lang) if(LINKER_SUPPORTS_PDB) run_cmake(NonValidTarget-TARGET_PDB_FILE) |