diff options
Diffstat (limited to 'gl/m4/warnings.m4')
| -rw-r--r-- | gl/m4/warnings.m4 | 47 |
1 files changed, 33 insertions, 14 deletions
diff --git a/gl/m4/warnings.m4 b/gl/m4/warnings.m4 index c14c4801e7..28b8294ef0 100644 --- a/gl/m4/warnings.m4 +++ b/gl/m4/warnings.m4 @@ -1,4 +1,4 @@ -# warnings.m4 serial 6 +# warnings.m4 serial 7 dnl Copyright (C) 2008-2012 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -15,28 +15,47 @@ m4_ifdef([AS_VAR_APPEND], [AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])]) -# gl_WARN_ADD(PARAMETER, [VARIABLE = WARN_CFLAGS]) -# ------------------------------------------------ -# Adds parameter to WARN_CFLAGS if the compiler supports it. For example, -# gl_WARN_ADD([-Wparentheses]). +# gl_COMPILER_OPTION_IF(OPTION, [IF-SUPPORTED], [IF-NOT-SUPPORTED], +# [PROGRAM = AC_LANG_PROGRAM()]) +# ----------------------------------------------------------------- +# Check if the compiler supports OPTION when compiling PROGRAM. # -# If VARIABLE is a variable name, AC_SUBST it. -AC_DEFUN([gl_WARN_ADD], -dnl FIXME: gl_Warn must be used unquoted until we can assume -dnl autoconf 2.64 or newer. +# FIXME: gl_Warn must be used unquoted until we can assume Autoconf +# 2.64 or newer. +AC_DEFUN([gl_COMPILER_OPTION_IF], [AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_[]_AC_LANG_ABBREV[]_$1])dnl AS_VAR_PUSHDEF([gl_Flags], [_AC_LANG_PREFIX[]FLAGS])dnl AC_CACHE_CHECK([whether _AC_LANG compiler handles $1], m4_defn([gl_Warn]), [ gl_save_compiler_FLAGS="$gl_Flags" - gl_Flags="$gl_Flags $1" - AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], + gl_AS_VAR_APPEND(m4_defn([gl_Flags]), [" $1"]) + AC_COMPILE_IFELSE([m4_default([$4], [AC_LANG_PROGRAM([])])], [AS_VAR_SET(gl_Warn, [yes])], [AS_VAR_SET(gl_Warn, [no])]) gl_Flags="$gl_save_compiler_FLAGS" ]) -AS_VAR_IF(gl_Warn, [yes], - [gl_AS_VAR_APPEND(m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]), [" $1"])]) +AS_VAR_IF(gl_Warn, [yes], [$2], [$3]) AS_VAR_POPDEF([gl_Flags])dnl AS_VAR_POPDEF([gl_Warn])dnl -m4_ifval([$2], [AS_LITERAL_IF([$2], [AC_SUBST([$2])], [])])dnl ]) + + +# gl_WARN_ADD(OPTION, [VARIABLE = WARN_CFLAGS], +# [PROGRAM = AC_LANG_PROGRAM()]) +# --------------------------------------------- +# Adds parameter to WARN_CFLAGS if the compiler supports it when +# compiling PROGRAM. For example, gl_WARN_ADD([-Wparentheses]). +# +# If VARIABLE is a variable name, AC_SUBST it. +AC_DEFUN([gl_WARN_ADD], +[gl_COMPILER_OPTION_IF([$1], + [gl_AS_VAR_APPEND(m4_if([$2], [], [[WARN_CFLAGS]], [[$2]]), [" $1"])], + [], + [$3]) +m4_ifval([$2], + [AS_LITERAL_IF([$2], [AC_SUBST([$2])])], + [AC_SUBST([WARN_CFLAGS])])dnl +]) + +# Local Variables: +# mode: autoconf +# End: |