Ninja: Fix Fortran support with response files

The Ninja generator splits preprocessing and compilation steps for
Fortran.  Fix this logic to work when using response files for
compilation so that it works for the preprocessing step too.

This fixes behavior under `CMAKE_NINJA_FORCE_RESPONSE_FILE`.

Issue: #17877

4 files changed, 12 insertions, 0 deletions

diff --git a/Tests/RunCMake/Ninja/RspFileC.cmake b/Tests/RunCMake/Ninja/RspFileC.cmake
new file mode 100644
index 0000000..4a40682
--- /dev/null
+++ b/Tests/RunCMake/Ninja/RspFileC.cmake
@@ -0,0 +1,2 @@
+set(ENV{CMAKE_NINJA_FORCE_RESPONSE_FILE} 1)
+enable_language(C)
diff --git a/Tests/RunCMake/Ninja/RspFileCXX.cmake b/Tests/RunCMake/Ninja/RspFileCXX.cmake
new file mode 100644
index 0000000..9e61ffe
--- /dev/null
+++ b/Tests/RunCMake/Ninja/RspFileCXX.cmake
@@ -0,0 +1,2 @@
+set(ENV{CMAKE_NINJA_FORCE_RESPONSE_FILE} 1)
+enable_language(CXX)
diff --git a/Tests/RunCMake/Ninja/RspFileFortran.cmake b/Tests/RunCMake/Ninja/RspFileFortran.cmake
new file mode 100644
index 0000000..8c18e37
--- /dev/null
+++ b/Tests/RunCMake/Ninja/RspFileFortran.cmake
@@ -0,0 +1,2 @@
+set(ENV{CMAKE_NINJA_FORCE_RESPONSE_FILE} 1)
+enable_language(Fortran)
diff --git a/Tests/RunCMake/Ninja/RunCMakeTest.cmake b/Tests/RunCMake/Ninja/RunCMakeTest.cmake
index b3720fb..3bb2b6b 100644
--- a/Tests/RunCMake/Ninja/RunCMakeTest.cmake
+++ b/Tests/RunCMake/Ninja/RunCMakeTest.cmake
@@ -40,6 +40,12 @@ run_CMP0058(NEW-by)
 
 run_cmake(CustomCommandDepfile)
 
+run_cmake(RspFileC)
+run_cmake(RspFileCXX)
+if(TEST_Fortran)
+  run_cmake(RspFileFortran)
+endif()
+
 function(run_CommandConcat)
   set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/CommandConcat-build)
   set(RunCMake_TEST_NO_CLEAN 1)