Genex: Per-source $<COMPILE_LANGUAGE:...> support

Fixes: #17542

8 files changed, 59 insertions, 0 deletions

diff --git a/Tests/GeneratorExpression/CMakeLists.txt b/Tests/GeneratorExpression/CMakeLists.txt
index 5165970..0585d0c 100644
--- a/Tests/GeneratorExpression/CMakeLists.txt
+++ b/Tests/GeneratorExpression/CMakeLists.txt
@@ -263,9 +263,17 @@ add_custom_target(check-part4 ALL
 add_executable(srcgenex_flags srcgenex_flags.c)
 set_property(SOURCE srcgenex_flags.c PROPERTY COMPILE_FLAGS "-DNAME=$<TARGET_PROPERTY:NAME>")
 
+add_executable(srcgenex_flags_COMPILE_LANGUAGE srcgenex_flags_COMPILE_LANGUAGE.c)
+set_property(SOURCE srcgenex_flags_COMPILE_LANGUAGE.c PROPERTY COMPILE_FLAGS "$<$<COMPILE_LANGUAGE:C>:-DNAME=$<TARGET_PROPERTY:NAME>>")
+
 add_executable(srcgenex_defs srcgenex_defs.c)
 set_property(SOURCE srcgenex_defs.c PROPERTY COMPILE_DEFINITIONS NAME=$<TARGET_PROPERTY:NAME>)
 
+if (CMAKE_GENERATOR MATCHES "Makefiles|Ninja|Watcom WMake")
+  add_executable(srcgenex_defs_COMPILE_LANGUAGE srcgenex_defs_COMPILE_LANGUAGE.c)
+  set_property(SOURCE srcgenex_defs_COMPILE_LANGUAGE.c PROPERTY COMPILE_DEFINITIONS $<$<COMPILE_LANGUAGE:C>:NAME=$<TARGET_PROPERTY:NAME>>)
+endif()
+
 #-----------------------------------------------------------------------------
 # Cover test properties with generator expressions.
 add_executable(echo echo.c)
diff --git a/Tests/GeneratorExpression/srcgenex_defs_COMPILE_LANGUAGE.c b/Tests/GeneratorExpression/srcgenex_defs_COMPILE_LANGUAGE.c
new file mode 100644
index 0000000..421b55b
--- /dev/null
+++ b/Tests/GeneratorExpression/srcgenex_defs_COMPILE_LANGUAGE.c
@@ -0,0 +1,12 @@
+int srcgenex_defs_COMPILE_LANGUAGE(void)
+{
+  return 0;
+}
+
+int main(int argc, char* argv[])
+{
+#ifndef NAME
+#error NAME not defined
+#endif
+  return NAME();
+}
diff --git a/Tests/GeneratorExpression/srcgenex_flags_COMPILE_LANGUAGE.c b/Tests/GeneratorExpression/srcgenex_flags_COMPILE_LANGUAGE.c
new file mode 100644
index 0000000..4e80d6e
--- /dev/null
+++ b/Tests/GeneratorExpression/srcgenex_flags_COMPILE_LANGUAGE.c
@@ -0,0 +1,12 @@
+int srcgenex_flags_COMPILE_LANGUAGE(void)
+{
+  return 0;
+}
+
+int main(int argc, char* argv[])
+{
+#ifndef NAME
+#error NAME not defined
+#endif
+  return NAME();
+}
diff --git a/Tests/RunCMake/COMPILE_LANGUAGE-genex/PerSourceCompileDefinitions-result.txt b/Tests/RunCMake/COMPILE_LANGUAGE-genex/PerSourceCompileDefinitions-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/COMPILE_LANGUAGE-genex/PerSourceCompileDefinitions-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/COMPILE_LANGUAGE-genex/PerSourceCompileDefinitions-stderr-VS.txt b/Tests/RunCMake/COMPILE_LANGUAGE-genex/PerSourceCompileDefinitions-stderr-VS.txt
new file mode 100644
index 0000000..5d19153
--- /dev/null
+++ b/Tests/RunCMake/COMPILE_LANGUAGE-genex/PerSourceCompileDefinitions-stderr-VS.txt
@@ -0,0 +1,7 @@
+CMake Error:
+  Error evaluating generator expression:
+
+    \$<COMPILE_LANGUAGE:CXX>
+
+  \$<COMPILE_LANGUAGE:...> may only be used for COMPILE_OPTIONS and
+  file\(GENERATE\) with the Visual Studio generator.
diff --git a/Tests/RunCMake/COMPILE_LANGUAGE-genex/PerSourceCompileDefinitions-stderr-Xcode.txt b/Tests/RunCMake/COMPILE_LANGUAGE-genex/PerSourceCompileDefinitions-stderr-Xcode.txt
new file mode 100644
index 0000000..4a4564e
--- /dev/null
+++ b/Tests/RunCMake/COMPILE_LANGUAGE-genex/PerSourceCompileDefinitions-stderr-Xcode.txt
@@ -0,0 +1,7 @@
+CMake Error:
+  Error evaluating generator expression:
+
+    \$<COMPILE_LANGUAGE:CXX>
+
+  \$<COMPILE_LANGUAGE:...> may only be used for COMPILE_OPTIONS and
+  file\(GENERATE\) with the Xcode generator.
diff --git a/Tests/RunCMake/COMPILE_LANGUAGE-genex/PerSourceCompileDefinitions.cmake b/Tests/RunCMake/COMPILE_LANGUAGE-genex/PerSourceCompileDefinitions.cmake
new file mode 100644
index 0000000..3a07d7d
--- /dev/null
+++ b/Tests/RunCMake/COMPILE_LANGUAGE-genex/PerSourceCompileDefinitions.cmake
@@ -0,0 +1,5 @@
+
+enable_language(CXX)
+
+add_executable(main main.cpp)
+set_property(SOURCE main.cpp PROPERTY COMPILE_DEFINITIONS $<$<COMPILE_LANGUAGE:CXX>:ANYTHING>)
diff --git a/Tests/RunCMake/COMPILE_LANGUAGE-genex/RunCMakeTest.cmake b/Tests/RunCMake/COMPILE_LANGUAGE-genex/RunCMakeTest.cmake
index 421fa73..1a93dcd 100644
--- a/Tests/RunCMake/COMPILE_LANGUAGE-genex/RunCMakeTest.cmake
+++ b/Tests/RunCMake/COMPILE_LANGUAGE-genex/RunCMakeTest.cmake
@@ -14,3 +14,10 @@ elseif (RunCMake_GENERATOR MATCHES "Visual Studio")
     set(RunCMake-stderr-file IncludeDirectories-stderr-VS.txt)
     run_cmake(IncludeDirectories)
 endif()
+if (RunCMake_GENERATOR STREQUAL "Xcode")
+    set(RunCMake-stderr-file PerSourceCompileDefinitions-stderr-Xcode.txt)
+    run_cmake(PerSourceCompileDefinitions)
+elseif (RunCMake_GENERATOR MATCHES "Visual Studio")
+    set(RunCMake-stderr-file PerSourceCompileDefinitions-stderr-VS.txt)
+    run_cmake(PerSourceCompileDefinitions)
+endif()