diff options
Diffstat (limited to 'gnulib-m4/gnulib-common.m4')
| -rw-r--r-- | gnulib-m4/gnulib-common.m4 | 108 |
1 files changed, 102 insertions, 6 deletions
diff --git a/gnulib-m4/gnulib-common.m4 b/gnulib-m4/gnulib-common.m4 index 87a9a751..d17cbec5 100644 --- a/gnulib-m4/gnulib-common.m4 +++ b/gnulib-m4/gnulib-common.m4 @@ -1,4 +1,4 @@ -# gnulib-common.m4 serial 69 +# gnulib-common.m4 serial 74 dnl Copyright (C) 2007-2022 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, @@ -69,7 +69,9 @@ AC_DEFUN([gl_COMMON_BODY], [ [/* Attributes. */ #if (defined __has_attribute \ && (!defined __clang_minor__ \ - || 3 < __clang_major__ + (5 <= __clang_minor__))) + || (defined __apple_build_version__ \ + ? 6000000 <= __apple_build_version__ \ + : 3 < __clang_major__ + (5 <= __clang_minor__)))) # define _GL_HAS_ATTRIBUTE(attr) __has_attribute (__##attr##__) #else # define _GL_HAS_ATTRIBUTE(attr) _GL_ATTR_##attr @@ -104,12 +106,16 @@ AC_DEFUN([gl_COMMON_BODY], [ #endif #ifdef __has_c_attribute +# if ((defined __STDC_VERSION__ ? __STDC_VERSION__ : 0) <= 201710 \ + && _GL_GNUC_PREREQ (4, 6)) +# pragma GCC diagnostic ignored "-Wpedantic" +# endif # define _GL_HAS_C_ATTRIBUTE(attr) __has_c_attribute (__##attr##__) #else # define _GL_HAS_C_ATTRIBUTE(attr) 0 #endif -]dnl There is no _GL_ATTRIBUTE_ALIGNED; use stdalign's _Alignas instead. +]dnl There is no _GL_ATTRIBUTE_ALIGNED; use stdalign's alignas instead. [ /* _GL_ATTRIBUTE_ALLOC_SIZE ((N)) declares that the Nth argument of the function is the size of the returned memory block. @@ -181,7 +187,12 @@ AC_DEFUN([gl_COMMON_BODY], [ #else # define _GL_ATTRIBUTE_DEALLOC(f, i) #endif -#define _GL_ATTRIBUTE_DEALLOC_FREE _GL_ATTRIBUTE_DEALLOC (free, 1) +/* If gnulib's <string.h> or <wchar.h> has already defined this macro, continue + to use this earlier definition, since <stdlib.h> may not have been included + yet. */ +#ifndef _GL_ATTRIBUTE_DEALLOC_FREE +# define _GL_ATTRIBUTE_DEALLOC_FREE _GL_ATTRIBUTE_DEALLOC (free, 1) +#endif /* _GL_ATTRIBUTE_DEPRECATED: Declares that an entity is deprecated. The compiler may warn if the entity is used. */ @@ -302,7 +313,8 @@ AC_DEFUN([gl_COMMON_BODY], [ #else # define _GL_ATTRIBUTE_MAYBE_UNUSED _GL_ATTRIBUTE_UNUSED #endif -/* Alternative spelling of this macro, for convenience. */ +/* Alternative spelling of this macro, for convenience and for + compatibility with glibc/include/libc-symbols.h. */ #define _GL_UNUSED _GL_ATTRIBUTE_MAYBE_UNUSED /* Earlier spellings of this macro. */ #define _UNUSED_PARAMETER_ _GL_ATTRIBUTE_MAYBE_UNUSED @@ -813,6 +825,24 @@ AC_DEFUN([gl_CACHE_VAL_SILENT], ]) ]) +# gl_CONDITIONAL(conditional, condition) +# is like AM_CONDITIONAL(conditional, condition), except that it does not +# produce an error +# configure: error: conditional "..." was never defined. +# Usually this means the macro was only invoked conditionally. +# when only invoked conditionally. Instead, in that case, both the _TRUE +# and the _FALSE case are disabled. +AC_DEFUN([gl_CONDITIONAL], +[ + pushdef([AC_CONFIG_COMMANDS_PRE], [:])dnl + AM_CONDITIONAL([$1], [$2]) + popdef([AC_CONFIG_COMMANDS_PRE])dnl + if test -z "${[$1]_TRUE}" && test -z "${[$1]_FALSE}"; then + [$1]_TRUE='#' + [$1]_FALSE='#' + fi +]) + # gl_CC_ALLOW_WARNINGS # sets and substitutes a variable GL_CFLAG_ALLOW_WARNINGS, to a $(CC) option # that reverts a preceding '-Werror' option, if available. @@ -879,6 +909,72 @@ AC_DEFUN([gl_CXX_ALLOW_WARNINGS], AC_SUBST([GL_CXXFLAG_ALLOW_WARNINGS]) ]) +# gl_CC_GNULIB_WARNINGS +# sets and substitutes a variable GL_CFLAG_GNULIB_WARNINGS, to a $(CC) option +# set that enables or disables warnings as suitable for the Gnulib coding style. +AC_DEFUN([gl_CC_GNULIB_WARNINGS], +[ + AC_REQUIRE([gl_CC_ALLOW_WARNINGS]) + dnl Assume that the compiler supports -Wno-* options only if it also supports + dnl -Wno-error. + GL_CFLAG_GNULIB_WARNINGS='' + if test -n "$GL_CFLAG_ALLOW_WARNINGS"; then + dnl Enable these warning options: + dnl + dnl GCC clang + dnl -Wno-cast-qual >= 3 >= 3.9 + dnl -Wno-conversion >= 3 >= 3.9 + dnl -Wno-float-conversion >= 4.9 >= 3.9 + dnl -Wno-float-equal >= 3 >= 3.9 + dnl -Wimplicit-fallthrough >= 7 >= 3.9 + dnl -Wno-pedantic >= 4.8 >= 3.9 + dnl -Wno-sign-compare >= 3 >= 3.9 + dnl -Wno-sign-conversion >= 4.3 >= 3.9 + dnl -Wno-type-limits >= 4.3 >= 3.9 + dnl -Wno-undef >= 3 >= 3.9 + dnl -Wno-unsuffixed-float-constants >= 4.5 + dnl -Wno-unused-function >= 3 >= 3.9 + dnl -Wno-unused-parameter >= 3 >= 3.9 + dnl + cat > conftest.c <<\EOF + #if __GNUC__ >= 3 || (__clang_major__ + (__clang_minor__ >= 9) > 3) + -Wno-cast-qual + -Wno-conversion + -Wno-float-equal + -Wno-sign-compare + -Wno-undef + -Wno-unused-function + -Wno-unused-parameter + #endif + #if __GNUC__ + (__GNUC_MINOR__ >= 9) > 4 || (__clang_major__ + (__clang_minor__ >= 9) > 3) + -Wno-float-conversion + #endif + #if __GNUC__ >= 7 || (__clang_major__ + (__clang_minor__ >= 9) > 3) + -Wimplicit-fallthrough + #endif + #if __GNUC__ + (__GNUC_MINOR__ >= 8) > 4 || (__clang_major__ + (__clang_minor__ >= 9) > 3) + -Wno-pedantic + #endif + #if __GNUC__ + (__GNUC_MINOR__ >= 3) > 4 || (__clang_major__ + (__clang_minor__ >= 9) > 3) + -Wno-sign-conversion + -Wno-type-limits + #endif + #if __GNUC__ + (__GNUC_MINOR__ >= 5) > 4 + -Wno-unsuffixed-float-constants + #endif +EOF + gl_command="$CC $CFLAGS $CPPFLAGS -E conftest.c > conftest.out" + if AC_TRY_EVAL([gl_command]); then + gl_options=`grep -v '#' conftest.out` + for word in $gl_options; do + GL_CFLAG_GNULIB_WARNINGS="$GL_CFLAG_GNULIB_WARNINGS $word" + done + fi + rm -f conftest.c conftest.out + fi + AC_SUBST([GL_CFLAG_GNULIB_WARNINGS]) +]) + dnl gl_CONDITIONAL_HEADER([foo.h]) dnl takes a shell variable GL_GENERATE_FOO_H (with value true or false) as input dnl and produces @@ -903,7 +999,7 @@ AC_DEFUN([gl_CONDITIONAL_HEADER], *) echo "*** gl_generate_var is not set correctly" 1>&2; exit 1 ;; esac AC_SUBST(gl_header_name) - AM_CONDITIONAL(gl_generate_cond, [$gl_generate_var]) + gl_CONDITIONAL(gl_generate_cond, [$gl_generate_var]) m4_popdef([gl_generate_cond]) m4_popdef([gl_generate_var]) m4_popdef([gl_header_name]) |