try_compile: Add option to control type of target

Create a `CMAKE_TRY_COMPILE_TARGET_TYPE` option to specify use
of `add_library(... STATIC ...)` for the generated test project.
This will be useful for cross-compiling toolchains that cannot
link a binary without custom flags or scripts.

7 files changed, 41 insertions, 0 deletions

diff --git a/Tests/RunCMake/try_compile/RunCMakeTest.cmake b/Tests/RunCMake/try_compile/RunCMakeTest.cmake
index 6cdbafa..43ce998 100644
--- a/Tests/RunCMake/try_compile/RunCMakeTest.cmake
+++ b/Tests/RunCMake/try_compile/RunCMakeTest.cmake
@@ -16,6 +16,10 @@ run_cmake(BadSources2)
 run_cmake(NonSourceCopyFile)
 run_cmake(NonSourceCompileDefinitions)
 
+run_cmake(TargetTypeExe)
+run_cmake(TargetTypeInvalid)
+run_cmake(TargetTypeStatic)
+
 run_cmake(CMP0056)
 
 if(RunCMake_GENERATOR MATCHES "Make|Ninja")
diff --git a/Tests/RunCMake/try_compile/TargetTypeExe.cmake b/Tests/RunCMake/try_compile/TargetTypeExe.cmake
new file mode 100644
index 0000000..9b6e727
--- /dev/null
+++ b/Tests/RunCMake/try_compile/TargetTypeExe.cmake
@@ -0,0 +1,14 @@
+enable_language(C)
+set(CMAKE_TRY_COMPILE_TARGET_TYPE EXECUTABLE)
+try_compile(result ${CMAKE_CURRENT_BINARY_DIR}
+  SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/src.c
+  OUTPUT_VARIABLE out
+  COPY_FILE ${CMAKE_CURRENT_BINARY_DIR}/copy
+  COPY_FILE_ERROR copy_err
+  )
+if(NOT result)
+  message(FATAL_ERROR "try_compile failed:\n${out}")
+endif()
+if(copy_err)
+  message(FATAL_ERROR "try_compile COPY_FILE failed:\n${copy_err}")
+endif()
diff --git a/Tests/RunCMake/try_compile/TargetTypeInvalid-result.txt b/Tests/RunCMake/try_compile/TargetTypeInvalid-result.txt
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/Tests/RunCMake/try_compile/TargetTypeInvalid-result.txt
@@ -0,0 +1 @@
+1
diff --git a/Tests/RunCMake/try_compile/TargetTypeInvalid-stderr.txt b/Tests/RunCMake/try_compile/TargetTypeInvalid-stderr.txt
new file mode 100644
index 0000000..08b281a
--- /dev/null
+++ b/Tests/RunCMake/try_compile/TargetTypeInvalid-stderr.txt
@@ -0,0 +1,5 @@
+^CMake Error at TargetTypeInvalid.cmake:2 \(try_compile\):
+  Invalid value 'INVALID' for CMAKE_TRY_COMPILE_TARGET_TYPE.  Only
+  'EXECUTABLE' and 'STATIC_LIBRARY' are allowed.
+Call Stack \(most recent call first\):
+  CMakeLists.txt:3 \(include\)
diff --git a/Tests/RunCMake/try_compile/TargetTypeInvalid.cmake b/Tests/RunCMake/try_compile/TargetTypeInvalid.cmake
new file mode 100644
index 0000000..0bbc4ac
--- /dev/null
+++ b/Tests/RunCMake/try_compile/TargetTypeInvalid.cmake
@@ -0,0 +1,2 @@
+set(CMAKE_TRY_COMPILE_TARGET_TYPE INVALID)
+try_compile(result ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/src.c)
diff --git a/Tests/RunCMake/try_compile/TargetTypeStatic.cmake b/Tests/RunCMake/try_compile/TargetTypeStatic.cmake
new file mode 100644
index 0000000..006b8b8
--- /dev/null
+++ b/Tests/RunCMake/try_compile/TargetTypeStatic.cmake
@@ -0,0 +1,14 @@
+enable_language(C)
+set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
+try_compile(result ${CMAKE_CURRENT_BINARY_DIR}
+  SOURCES ${CMAKE_CURRENT_SOURCE_DIR}/other.c
+  OUTPUT_VARIABLE out
+  COPY_FILE ${CMAKE_CURRENT_BINARY_DIR}/copy
+  COPY_FILE_ERROR copy_err
+  )
+if(NOT result)
+  message(FATAL_ERROR "try_compile failed:\n${out}")
+endif()
+if(copy_err)
+  message(FATAL_ERROR "try_compile COPY_FILE failed:\n${copy_err}")
+endif()
diff --git a/Tests/RunCMake/try_compile/other.c b/Tests/RunCMake/try_compile/other.c
new file mode 100644
index 0000000..6c24f10
--- /dev/null
+++ b/Tests/RunCMake/try_compile/other.c
@@ -0,0 +1 @@
+int other(void) { return 0; }