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build: fix -Wtrampolines picky warning for gcc 4.x versions

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Caused an error when using cmake with gcc 4.4 and 4.5.
Also 4.3 when using autotools.

Seen with GNU 4.4.0 in CeGCC 0.59.1:
```
cc1: error: unrecognized command line option "-Wtrampolines"
```

`-Wtrampolines` requires gcc 4.6 or upper.

Ref: https://gcc.gnu.org/onlinedocs/gcc-4.6.0/gcc/Warning-Options.html
Ref: https://master.dl.sourceforge.net/project/cegcc/cegcc/0.59.1/cegcc_mingw32ce_snowleopard_r1397.tar.bz2

Closes #15962
This commit is contained in:
Viktor Szakats 2025-01-10 11:03:16 +01:00
parent fdc588dc10
commit 95658f9ca3
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GPG key ID: B5ABD165E2AEF201
2 changed files with 3 additions and 2 deletions
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3
m4/curl-compilers.m4
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@ -1030,7 +1030,7 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [type-limits old-style-declaration])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [missing-parameter-type empty-body])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [clobbered ignored-qualifiers])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conversion trampolines])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [conversion])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [sign-conversion])
tmp_CFLAGS="$tmp_CFLAGS -Wno-error=sign-conversion"
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [vla])
@ -1055,6 +1055,7 @@ AC_DEFUN([CURL_SET_COMPILER_WARNING_OPTS], [
dnl Only gcc 4.6 or later
if test "$compiler_num" -ge "406"; then
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [double-promotion])
CURL_ADD_COMPILER_WARNINGS([tmp_CFLAGS], [trampolines])
fi
#
dnl only gcc 4.8 or later