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-rw-r--r--m4/manywarnings.m4119
1 files changed, 57 insertions, 62 deletions
diff --git a/m4/manywarnings.m4 b/m4/manywarnings.m4
index 7402edcddfd..3c6795ceb28 100644
--- a/m4/manywarnings.m4
+++ b/m4/manywarnings.m4
@@ -1,4 +1,4 @@
-# manywarnings.m4 serial 23
+# manywarnings.m4 serial 25
dnl Copyright (C) 2008-2024 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -6,6 +6,8 @@ dnl with or without modifications, as long as this notice is preserved.
dnl From Simon Josefsson
+AC_PREREQ([2.64])
+
# gl_MANYWARN_COMPLEMENT(OUTVAR, LISTVAR, REMOVEVAR)
# --------------------------------------------------
# Copy LISTVAR to OUTVAR except for the entries in REMOVEVAR.
@@ -21,7 +23,7 @@ AC_DEFUN([gl_MANYWARN_COMPLEMENT],
*" $gl_warn_item "*)
;;
*)
- gl_AS_VAR_APPEND([gl_warn_set], [" $gl_warn_item"])
+ AS_VAR_APPEND([gl_warn_set], [" $gl_warn_item"])
;;
esac
done
@@ -46,59 +48,46 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC(C)],
dnl First, check for some issues that only occur when combining multiple
dnl gcc warning categories.
AC_REQUIRE([AC_PROG_CC])
- if test -n "$GCC"; then
-
- dnl Check if -Wextra -Werror -Wno-missing-field-initializers is supported
- dnl with the current $CC $CFLAGS $CPPFLAGS.
- AC_CACHE_CHECK([whether -Wno-missing-field-initializers is supported],
- [gl_cv_cc_nomfi_supported],
- [gl_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -Wextra -Werror -Wno-missing-field-initializers"
+ AS_IF([test -n "$GCC"], [
+ AC_CACHE_CHECK([whether -Wno-missing-field-initializers is needed],
+ [gl_cv_cc_nomfi_needed],
+ [gl_cv_cc_nomfi_needed=no
+ gl_saved_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Wextra -Werror"
AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM([[]], [[]])],
- [gl_cv_cc_nomfi_supported=yes],
- [gl_cv_cc_nomfi_supported=no])
- CFLAGS="$gl_save_CFLAGS"
- ])
-
- if test "$gl_cv_cc_nomfi_supported" = yes; then
- dnl Now check whether -Wno-missing-field-initializers is needed
- dnl for the { 0, } construct.
- AC_CACHE_CHECK([whether -Wno-missing-field-initializers is needed],
- [gl_cv_cc_nomfi_needed],
- [gl_save_CFLAGS="$CFLAGS"
- CFLAGS="$CFLAGS -Wextra -Werror"
- AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM(
- [[int f (void)
- {
- typedef struct { int a; int b; } s_t;
- s_t s1 = { 0, };
- return s1.b;
- }
- ]],
- [[]])],
- [gl_cv_cc_nomfi_needed=no],
- [gl_cv_cc_nomfi_needed=yes])
- CFLAGS="$gl_save_CFLAGS"
- ])
- fi
+ [AC_LANG_PROGRAM(
+ [[struct file_data { int desc, name; };
+ struct cmp { struct file_data file[1]; };
+ void f (struct cmp *r)
+ {
+ typedef struct { int a; int b; } s_t;
+ s_t s1 = { 0, };
+ struct cmp cmp = { .file[0].desc = r->file[0].desc + s1.a };
+ *r = cmp;
+ }
+ ]],
+ [[]])],
+ [],
+ [CFLAGS="$CFLAGS -Wno-missing-field-initializers"
+ AC_COMPILE_IFELSE([],
+ [gl_cv_cc_nomfi_needed=yes])])
+ CFLAGS="$gl_saved_CFLAGS"
+ ])
dnl Next, check if -Werror -Wuninitialized is useful with the
dnl user's choice of $CFLAGS; some versions of gcc warn that it
dnl has no effect if -O is not also used
AC_CACHE_CHECK([whether -Wuninitialized is supported],
[gl_cv_cc_uninitialized_supported],
- [gl_save_CFLAGS="$CFLAGS"
+ [gl_saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror -Wuninitialized"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[]], [[]])],
[gl_cv_cc_uninitialized_supported=yes],
[gl_cv_cc_uninitialized_supported=no])
- CFLAGS="$gl_save_CFLAGS"
+ CFLAGS="$gl_saved_CFLAGS"
])
-
- fi
+ ])
# List all gcc warning categories.
# To compare this list to your installed GCC's, run this Bash command:
@@ -109,7 +98,7 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC(C)],
# <(LC_ALL=C gcc --help=warnings | sed -n 's/^ \(-[^ ]*\) .*/\1/p' | sort)
$1=
- for gl_manywarn_item in -fanalyzer -fno-common \
+ for gl_manywarn_item in -fanalyzer -fstrict-flex-arrays \
-Wall \
-Warith-conversion \
-Wbad-function-cast \
@@ -137,6 +126,7 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC(C)],
-Wpointer-arith \
-Wshadow \
-Wstack-protector \
+ -Wstrict-flex-arrays \
-Wstrict-overflow \
-Wstrict-prototypes \
-Wsuggest-attribute=cold \
@@ -160,46 +150,51 @@ AC_DEFUN([gl_MANYWARN_ALL_GCC(C)],
-Wwrite-strings \
\
; do
- gl_AS_VAR_APPEND([$1], [" $gl_manywarn_item"])
+ AS_VAR_APPEND([$1], [" $gl_manywarn_item"])
done
# gcc --help=warnings outputs an unusual form for these options; list
# them here so that the above 'comm' command doesn't report a false match.
- gl_AS_VAR_APPEND([$1], [' -Warray-bounds=2'])
- gl_AS_VAR_APPEND([$1], [' -Wattribute-alias=2'])
- gl_AS_VAR_APPEND([$1], [' -Wbidi-chars=any,ucn'])
- gl_AS_VAR_APPEND([$1], [' -Wformat-overflow=2'])
- gl_AS_VAR_APPEND([$1], [' -Wformat=2'])
- gl_AS_VAR_APPEND([$1], [' -Wformat-truncation=2'])
- gl_AS_VAR_APPEND([$1], [' -Wimplicit-fallthrough=5'])
- gl_AS_VAR_APPEND([$1], [' -Wshift-overflow=2'])
- gl_AS_VAR_APPEND([$1], [' -Wuse-after-free=3'])
- gl_AS_VAR_APPEND([$1], [' -Wunused-const-variable=2'])
- gl_AS_VAR_APPEND([$1], [' -Wvla-larger-than=4031'])
+ AS_VAR_APPEND([$1], [' -Warray-bounds=2'])
+ AS_VAR_APPEND([$1], [' -Wattribute-alias=2'])
+ AS_VAR_APPEND([$1], [' -Wbidi-chars=any,ucn'])
+ AS_VAR_APPEND([$1], [' -Wformat-overflow=2'])
+ AS_VAR_APPEND([$1], [' -Wformat=2'])
+ AS_VAR_APPEND([$1], [' -Wformat-truncation=2'])
+ AS_VAR_APPEND([$1], [' -Wimplicit-fallthrough=5'])
+ AS_VAR_APPEND([$1], [' -Wshift-overflow=2'])
+ AS_VAR_APPEND([$1], [' -Wuse-after-free=3'])
+ AS_VAR_APPEND([$1], [' -Wunused-const-variable=2'])
+ AS_VAR_APPEND([$1], [' -Wvla-larger-than=4031'])
# These are needed for older GCC versions.
- if test -n "$GCC"; then
- case `($CC --version) 2>/dev/null` in
+ if test -n "$GCC" && gl_gcc_version=`($CC --version) 2>/dev/null`; then
+ case $gl_gcc_version in
'gcc (GCC) '[[0-3]].* | \
'gcc (GCC) '4.[[0-7]].*)
- gl_AS_VAR_APPEND([$1], [' -fdiagnostics-show-option'])
- gl_AS_VAR_APPEND([$1], [' -funit-at-a-time'])
+ AS_VAR_APPEND([$1], [' -fdiagnostics-show-option'])
+ AS_VAR_APPEND([$1], [' -funit-at-a-time'])
+ ;;
+ esac
+ case $gl_gcc_version in
+ 'gcc (GCC) '[[0-9]].*)
+ AS_VAR_APPEND([$1], [' -fno-common'])
;;
esac
fi
# Disable specific options as needed.
if test "$gl_cv_cc_nomfi_needed" = yes; then
- gl_AS_VAR_APPEND([$1], [' -Wno-missing-field-initializers'])
+ AS_VAR_APPEND([$1], [' -Wno-missing-field-initializers'])
fi
if test "$gl_cv_cc_uninitialized_supported" = no; then
- gl_AS_VAR_APPEND([$1], [' -Wno-uninitialized'])
+ AS_VAR_APPEND([$1], [' -Wno-uninitialized'])
fi
# This warning have too many false alarms in GCC 11.2.1.
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101713
- gl_AS_VAR_APPEND([$1], [' -Wno-analyzer-malloc-leak'])
+ AS_VAR_APPEND([$1], [' -Wno-analyzer-malloc-leak'])
AC_LANG_POP([C])
])
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-02 15:09:26 +0000