m4.include/mc-cflags.m4

   1 dnl @synopsis mc_CHECK_CFLAGS
   2 dnl
   3 dnl Check flags supported by C compiler
   4 dnl
   5 dnl @author Slava Zanko <slavazanko@gmail.com>
   6 dnl @modified by Andrew Borodin <aborodin@vmail.ru>
   7 dnl @version 2021-09-19
   8 dnl @license GPL
   9 dnl @copyright Free Software Foundation, Inc.
  10
  11 AC_DEFUN([mc_CHECK_CFLAGS],[
  12     AC_LANG_PUSH(C)
  13
  14     mc_configured_cflags=""
  15
  16 dnl    AC_MSG_CHECKING([CC is $CC])
  17
  18     dnl https://stackoverflow.com/questions/52557417/how-to-check-support-compile-flag-in-autoconf-for-clang
  19     case "$CC" in
  20     clang*)
  21         EXTRA_OPTION="-Werror"
  22         ;;
  23     *)
  24         EXTRA_OPTION=""
  25         ;;
  26     esac
  27
  28     dnl Sorted -f options:
  29     case "$CC" in
  30     gcc*)
  31         AX_APPEND_COMPILE_FLAGS([-fdiagnostics-show-option], [mc_configured_cflags])
  32 dnl        AX_APPEND_COMPILE_FLAGS([-fno-stack-protector], [mc_configured_cflags])
  33         ;;
  34     *)
  35         ;;
  36     esac
  37
  38     dnl Sorted -W options:
  39     AX_APPEND_COMPILE_FLAGS([-Wassign-enum], [mc_configured_cflags], [$EXTRA_OPTION])
  40     AX_APPEND_COMPILE_FLAGS([-Wbad-function-cast], [mc_configured_cflags], [$EXTRA_OPTION])
  41     AX_APPEND_COMPILE_FLAGS([-Wcomment], [mc_configured_cflags], [$EXTRA_OPTION])
  42     AX_APPEND_COMPILE_FLAGS([-Wconditional-uninitialized], [mc_configured_cflags], [$EXTRA_OPTION])
  43     AX_APPEND_COMPILE_FLAGS([-Wdeclaration-after-statement], [mc_configured_cflags], [$EXTRA_OPTION])
  44     AX_APPEND_COMPILE_FLAGS([-Wfloat-conversion], [mc_configured_cflags], [$EXTRA_OPTION])
  45     AX_APPEND_COMPILE_FLAGS([-Wfloat-equal], [mc_configured_cflags], [$EXTRA_OPTION])
  46     AX_APPEND_COMPILE_FLAGS([-Wformat], [mc_configured_cflags], [$EXTRA_OPTION])
  47     AX_APPEND_COMPILE_FLAGS([-Wformat-security], [mc_configured_cflags], [$EXTRA_OPTION])
  48     AX_APPEND_COMPILE_FLAGS([-Wformat-signedness], [mc_configured_cflags], [$EXTRA_OPTION])
  49     AX_APPEND_COMPILE_FLAGS([-Wimplicit], [mc_configured_cflags], [$EXTRA_OPTION])
  50     AX_APPEND_COMPILE_FLAGS([-Wimplicit-fallthrough], [mc_configured_cflags], [$EXTRA_OPTION])
  51     AX_APPEND_COMPILE_FLAGS([-Wignored-qualifiers], [mc_configured_cflags], [$EXTRA_OPTION])
  52     AX_APPEND_COMPILE_FLAGS([-Wlogical-not-parentheses], [mc_configured_cflags], [$EXTRA_OPTION])
  53     AX_APPEND_COMPILE_FLAGS([-Wmaybe-uninitialized], [mc_configured_cflags], [$EXTRA_OPTION])
  54     AX_APPEND_COMPILE_FLAGS([-Wmissing-braces], [mc_configured_cflags], [$EXTRA_OPTION])
  55     AX_APPEND_COMPILE_FLAGS([-Wmissing-declarations], [mc_configured_cflags], [$EXTRA_OPTION])
  56     AX_APPEND_COMPILE_FLAGS([-Wmissing-field-initializers], [mc_configured_cflags], [$EXTRA_OPTION])
  57     AX_APPEND_COMPILE_FLAGS([-Wmissing-format-attribute], [mc_configured_cflags], [$EXTRA_OPTION])
  58     AX_APPEND_COMPILE_FLAGS([-Wmissing-parameter-type], [mc_configured_cflags], [$EXTRA_OPTION])
  59     AX_APPEND_COMPILE_FLAGS([-Wmissing-prototypes], [mc_configured_cflags], [$EXTRA_OPTION])
  60     AX_APPEND_COMPILE_FLAGS([-Wmissing-variable-declarations], [mc_configured_cflags], [$EXTRA_OPTION])
  61     AX_APPEND_COMPILE_FLAGS([-Wnested-externs], [mc_configured_cflags], [$EXTRA_OPTION])
  62     AX_APPEND_COMPILE_FLAGS([-Wno-long-long], [mc_configured_cflags], [$EXTRA_OPTION])
  63     AX_APPEND_COMPILE_FLAGS([-Wno-unreachable-code], [mc_configured_cflags], [$EXTRA_OPTION])
  64     AX_APPEND_COMPILE_FLAGS([-Wparentheses], [mc_configured_cflags], [$EXTRA_OPTION])
  65     AX_APPEND_COMPILE_FLAGS([-Wpointer-arith], [mc_configured_cflags], [$EXTRA_OPTION])
  66     AX_APPEND_COMPILE_FLAGS([-Wpointer-sign], [mc_configured_cflags], [$EXTRA_OPTION])
  67     AX_APPEND_COMPILE_FLAGS([-Wredundant-decls], [mc_configured_cflags], [$EXTRA_OPTION])
  68     AX_APPEND_COMPILE_FLAGS([-Wreturn-type], [mc_configured_cflags], [$EXTRA_OPTION])
  69     AX_APPEND_COMPILE_FLAGS([-Wsequence-point], [mc_configured_cflags], [$EXTRA_OPTION])
  70     AX_APPEND_COMPILE_FLAGS([-Wshadow], [mc_configured_cflags], [$EXTRA_OPTION])
  71     AX_APPEND_COMPILE_FLAGS([-Wsign-compare], [mc_configured_cflags], [$EXTRA_OPTION])
  72 dnl    AX_APPEND_COMPILE_FLAGS([-Wstrict-aliasing], [mc_configured_cflags], [$EXTRA_OPTION])
  73     AX_APPEND_COMPILE_FLAGS([-Wstrict-prototypes], [mc_configured_cflags], [$EXTRA_OPTION])
  74     AX_APPEND_COMPILE_FLAGS([-Wswitch], [mc_configured_cflags], [$EXTRA_OPTION])
  75     AX_APPEND_COMPILE_FLAGS([-Wswitch-default], [mc_configured_cflags], [$EXTRA_OPTION])
  76     AX_APPEND_COMPILE_FLAGS([-Wtype-limits], [mc_configured_cflags], [$EXTRA_OPTION])
  77     AX_APPEND_COMPILE_FLAGS([-Wundef], [mc_configured_cflags], [$EXTRA_OPTION])
  78     AX_APPEND_COMPILE_FLAGS([-Wuninitialized], [mc_configured_cflags], [$EXTRA_OPTION])
  79     AX_APPEND_COMPILE_FLAGS([-Wunreachable-code], [mc_configured_cflags], [$EXTRA_OPTION])
  80     AX_APPEND_COMPILE_FLAGS([-Wunused-but-set-variable], [mc_configured_cflags], [$EXTRA_OPTION])
  81     AX_APPEND_COMPILE_FLAGS([-Wunused-function], [mc_configured_cflags], [$EXTRA_OPTION])
  82     AX_APPEND_COMPILE_FLAGS([-Wunused-label], [mc_configured_cflags], [$EXTRA_OPTION])
  83     AX_APPEND_COMPILE_FLAGS([-Wunused-parameter], [mc_configured_cflags], [$EXTRA_OPTION])
  84     AX_APPEND_COMPILE_FLAGS([-Wunused-result], [mc_configured_cflags], [$EXTRA_OPTION])
  85     AX_APPEND_COMPILE_FLAGS([-Wunused-value], [mc_configured_cflags], [$EXTRA_OPTION])
  86     AX_APPEND_COMPILE_FLAGS([-Wunused-variable], [mc_configured_cflags], [$EXTRA_OPTION])
  87     AX_APPEND_COMPILE_FLAGS([-Wwrite-strings], [mc_configured_cflags], [$EXTRA_OPTION])
  88
  89     AC_LANG_POP()
  90 ])