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Explicitly specify the project is a C project.

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CMake assumes the default project uses both C and C++, and therefore
will fail if both a C and a C++ compiler isn't found. This essentially
blocks pure C projects from using msgpack-c if they also don't have a
C++ compiler.

Just specifying that the project is "C" isn't possible though, as the
test themselves use C++. The workaround here is that we specify the
project needs both a C and C++ compiler if tests are used, but only a C
compiler if the tests aren't used.
This commit is contained in:
dundargoc 2023-03-04 13:10:41 +01:00
parent b3de6f83cb
commit 2f543923d2
1 changed files with 8 additions and 9 deletions
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15
CMakeLists.txt
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@ -5,7 +5,14 @@ IF ((CMAKE_VERSION VERSION_GREATER 3.1) OR
CMAKE_POLICY(SET CMP0054 NEW)
ENDIF ()
OPTION (MSGPACK_BUILD_TESTS "Build msgpack tests." ON)
OPTION (MSGPACK_GEN_COVERAGE "Enable running gcov to get a test coverage report." OFF)
if(MSGPACK_BUILD_TESTS)
PROJECT (msgpack-c)
else()
PROJECT (msgpack-c C)
endif()
FILE (READ ${CMAKE_CURRENT_SOURCE_DIR}/include/msgpack/version_master.h contents)
STRING (REGEX MATCH "#define MSGPACK_VERSION_MAJOR *([0-9a-zA-Z_]*)" NULL_OUT ${contents})
@ -74,14 +81,6 @@ IF (MSGPACK_CHAR_SIGN)
SET (CMAKE_C_FLAGS "-f${MSGPACK_CHAR_SIGN}-char ${CMAKE_C_FLAGS}")
ENDIF ()
FIND_PACKAGE (GTest)
FIND_PACKAGE (ZLIB)
FIND_PACKAGE (Threads)
IF (GTEST_FOUND AND ZLIB_FOUND AND THREADS_FOUND)
OPTION (MSGPACK_BUILD_TESTS "Build msgpack tests." ON)
OPTION (MSGPACK_GEN_COVERAGE "Enable running gcov to get a test coverage report." OFF)
ENDIF ()
IF (DEFINED BUILD_SHARED_LIBS)
IF (BUILD_SHARED_LIBS)
IF (DEFINED MSGPACK_ENABLE_SHARED AND NOT MSGPACK_ENABLE_SHARED)