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CMakeLists.txt: fix build with gcc 4.8 (#661)

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-Werror=incompatible-pointer-types is unconditionally used since version
2.1.4 and 137a14e106. This will raise a
build failure when checking for threads on gcc 4.8:

/home/buildroot/autobuild/run/instance-3/output-1/host/bin/arm-none-linux-gnueabi-gcc --sysroot=/home/buildroot/autobuild/run/instance-3/output-1/host/arm-buildroot-linux-gnueabi/sysroot -DTESTKEYWORD=inline  -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Os -Wall -W -Wpointer-arith -Wcast-qual -Wstrict-prototypes -Wno-unused-parameter -Wdeclaration-after-statement -Werror=implicit-function-declaration -Werror=incompatible-pointer-types -Wbad-function-cast -Wcast-align   -DNDEBUG -fPIE   -o CMakeFiles/cmTC_98946.dir/CheckIncludeFile.c.o   -c /home/buildroot/autobuild/run/instance-3/output-1/build/fluidsynth-2.1.4/CMakeFiles/CMakeTmp/CheckIncludeFile.c
cc1: error: -Werror=incompatible-pointer-types: no option -Wincompatible-pointer-types

Fixes:
 - http://autobuild.buildroot.org/results/13cbba871db56ef8657a3d13c6ac8e1b4da0d244

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
This commit is contained in:
Fabrice Fontaine 2020-08-16 20:17:26 +02:00 committed by derselbst
parent 3ee2bbed96
commit 0cccf83a38
1 changed files with 8 additions and 1 deletions
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9
CMakeLists.txt
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@ -140,6 +140,7 @@ endif ( POLICY CMP0063 )
include ( DefaultDirs )
# Basic C library checks
include ( CheckCCompilerFlag )
include ( CheckSTDC )
include ( CheckIncludeFile )
include ( CheckFunctionExists )
@ -184,7 +185,13 @@ if ( CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID MATCHES "Clang" OR CMAKE_C_C
endif ( NOT APPLE AND NOT OS2 )
# define some warning flags
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -W -Wpointer-arith -Wcast-qual -Wstrict-prototypes -Wno-unused-parameter -Wdeclaration-after-statement -Werror=implicit-function-declaration -Werror=incompatible-pointer-types" )
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -W -Wpointer-arith -Wcast-qual -Wstrict-prototypes -Wno-unused-parameter -Wdeclaration-after-statement -Werror=implicit-function-declaration" )
check_c_compiler_flag ( "-Werror=incompatible-pointer-types" HAVE_INCOMPATIBLE_POINTER_TYPES )
if ( HAVE_INCOMPATIBLE_POINTER_TYPES )
set ( CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror=incompatible-pointer-types" )
endif ( HAVE_INCOMPATIBLE_POINTER_TYPES )
set ( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -W -Wpointer-arith -Wcast-qual -Wno-unused-parameter" )
# prepend to build type specific flags, to allow users to override
set ( CMAKE_C_FLAGS_DEBUG "-g ${CMAKE_C_FLAGS_DEBUG}" )