[sr-dev] [kamailio/kamailio] cmake is overriding distro build flags (Issue #4082)

### Description ping @xkaraman cmake is overriding distro build flags Here is typical CFLAGS for EL distros ``` export CFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -march=x86-64-v2 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection' ## try to build cd build/ make [ 1%] Building C object src/CMakeFiles/kamailio.dir/lib/srdb1/db_row.c.o In file included from /usr/include/bits/libc-header-start.h:33, from /usr/include/string.h:26, from /home/centos/src/kamailio-5.8/src/lib/srdb1/../../core/str.h:26, from /home/centos/src/kamailio-5.8/src/lib/srdb1/db_con.h:33, from /home/centos/src/kamailio-5.8/src/lib/srdb1/db_val.h:40, from /home/centos/src/kamailio-5.8/src/lib/srdb1/db_row.h:37, from /home/centos/src/kamailio-5.8/src/lib/srdb1/db_row.c:33: /usr/include/features.h:412:4: warning: #warning _FORTIFY_SOURCE requires compiling with optimization (-O) [-Wcpp] 412 | # warning _FORTIFY_SOURCE requires compiling with optimization (-O) ``` It is probably due to `cmake/compiler-specific.cmake`: ``` # If GCC version is greater than 4.2.0, enable the following flags if(CMAKE_C_COMPILER_VERSION VERSION_GREATER 4.2.0) target_compile_options( common INTERFACE -m64 -minline-all-stringops -falign-loops -ftree-vectorize -fno-strict-overflow -mtune=generic ) endif() ``` Packaging for ELx requires respecting the default flags - for EL9 included here for reference ``` CFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -march=x86-64-v2 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection' CXXFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -march=x86-64-v2 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection' FCFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -march=x86-64-v2 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -I/usr/lib64/gfortran/modules' FFLAGS='-O2 -flto=auto -ffat-lto-objects -fexceptions -g -grecord-gcc-switches -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -fstack-protector-strong -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -march=x86-64-v2 -mtune=generic -fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection -I/usr/lib64/gfortran/modules' LDFLAGS='-Wl,-z,relro -Wl,--as-needed -Wl,-z,now -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 ' ``` ELx packaging typically involves this dance: ``` # in practice RPM build tools have macros for all the following steps # use standard distro flags export CFLAGS=.... export CXXFLAGS=... export LDFLAGS=.... ./configure ``` Is there a way we can respect distro build flags with cmake? -- Reply to this email directly or view it on GitHub: https://github.com/kamailio/kamailio/issues/4082 You are receiving this because you are subscribed to this thread. Message ID: <kamailio/kamailio/issues/4082(a)github.com>