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Try to build with GCC's -Wdeclaration-after-statement.

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This will help catch things that'll cause issues on C89 compilers before we
send them on to fail on Buildbot.
This commit is contained in:
Ryan C. Gordon
2016-01-04 22:58:38 -05:00
parent 15bc7aea64
commit 1373e8909a
3 changed files with 92 additions and 12 deletions
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25
CMakeLists.txt
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@@ -334,6 +334,24 @@ set(HAVE_ASSERTIONS ${ASSERTIONS})
# Compiler option evaluation
if(USE_GCC OR USE_CLANG)
# Check for -Wall first, so later things can override pieces of it.
check_c_compiler_flag(-Wall HAVE_GCC_WALL)
if(HAVE_GCC_WALL)
list(APPEND EXTRA_CFLAGS "-Wall")
if(HAIKU)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-multichar")
endif()
endif()
check_c_compiler_flag(-Wdeclaration-after-statement HAVE_GCC_WDECLARATION_AFTER_STATEMENT)
if(HAVE_GCC_WDECLARATION_AFTER_STATEMENT)
check_c_compiler_flag(-Werror=declaration-after-statement HAVE_GCC_WERROR_DECLARATION_AFTER_STATEMENT)
if(HAVE_GCC_WERROR_DECLARATION_AFTER_STATEMENT)
list(APPEND EXTRA_CFLAGS "-Werror=declaration-after-statement")
endif()
list(APPEND EXTRA_CFLAGS "-Wdeclaration-after-statement")
endif()
if(DEPENDENCY_TRACKING)
check_c_source_compiles("
#if !defined(__GNUC__) || __GNUC__ < 3
@@ -375,13 +393,6 @@ if(USE_GCC OR USE_CLANG)
endif()
set(CMAKE_REQUIRED_FLAGS ${ORIG_CMAKE_REQUIRED_FLAGS})
check_c_compiler_flag(-Wall HAVE_GCC_WALL)
if(HAVE_GCC_WALL)
list(APPEND EXTRA_CFLAGS "-Wall")
if(HAIKU)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-multichar")
endif()
endif()
check_c_compiler_flag(-Wshadow HAVE_GCC_WSHADOW)
if(HAVE_GCC_WSHADOW)
list(APPEND EXTRA_CFLAGS "-Wshadow")