kc3-lang/libbsd/m4/libbsd-compiler.m4

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• Hash : 4f68a88f
  Author :
  Date : 2021-02-19T06:55:17
  

  build: Add compiler warnings support Detect as many warnings as possible during configure and enable them if the user did not supply any, so that any such problem can be spotted and fixed.

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• m4/libbsd-compiler.m4

• # Copyright © 2021 Guillem Jover <guillem@hadrons.org>
  
  # LIBBSD_CHECK_COMPILER_FLAG
  # -------------------------
  AC_DEFUN([LIBBSD_CHECK_COMPILER_FLAG], [
    AS_VAR_PUSHDEF([libbsd_varname_cache], [libbsd_cv_cflags_$1])
    AC_CACHE_CHECK([whether $CC accepts $1], [libbsd_varname_cache], [
      m4_define([libbsd_check_flag], m4_bpatsubst([$1], [^-Wno-], [-W]))
      AS_VAR_COPY([libbsd_save_CFLAGS], [CFLAGS])
      AS_VAR_SET([CFLAGS], ["-Werror libbsd_check_flag"])
      AC_COMPILE_IFELSE([
        AC_LANG_SOURCE([[]])
      ], [
        AS_VAR_SET([libbsd_varname_cache], [yes])
      ], [
        AS_VAR_SET([libbsd_varname_cache], [no])
      ])
      AS_VAR_COPY([CFLAGS], [libbsd_save_CFLAGS])
    ])
    AS_VAR_IF([libbsd_varname_cache], [yes], [
      AS_VAR_APPEND([LIBBSD_COMPILER_FLAGS], [" $1"])
    ])
    AS_VAR_POPDEF([libbsd_varname_cache])
  ])
  

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