-Wlto-type-mismatch warning in error()

[Sam James]

Hi,

Compiling texinfo 7.0.1 with CFLAGS="-O2 -flto -Werror=lto-type-mismatch" 
results
in the following:
```
make[3]: Entering directory 
'/var/tmp/portage/sys-apps/texinfo-7.0.1/work/texinfo-7.0.1/install-info'
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I..  -I.. -I../gnulib/lib 
-I../gnulib/lib -DLOCALEDIR=\"/usr/share/locale\"   -O2 -flto 
-Werror=lto-type-mismatch     -O2 -flto -Werror=lto-type-mismatch -ggdb3 
-Werror=implicit-function-declaration -Werror=implicit-int -c -o install-info.o 
install-info.c
x86_64-pc-linux-gnu-gcc  -O2 -flto -Werror=lto-type-mismatch     -O2 -flto 
-Werror=lto-type-mismatch -ggdb3 -Werror=implicit-function-declaration 
-Werror=implicit-int  -Wl,-O1 -Wl,--as-needed 
-Wl,--defsym=__gentoo_check_ldflags__=0 -Wl,-z,pack-relative-relocs -o 
ginstall-info install-info.o ../gnulib/lib/libgnu.a
../gnulib/lib/error.h:33:13: error: type of ‘error’ does not match original 
declaration [-Werror=lto-type-mismatch]
   33 | extern void error (int __status, int __errnum, const char *__format, 
...)
      |             ^
install-info.c:218:1: note: type mismatch in parameter 1
  218 | error (const char *fmt, ...)
      | ^
install-info.c:218:1: note: ‘error’ was previously declared here
install-info.c:218:1: note: code may be misoptimized unless 
‘-fno-strict-aliasing’ is used
lto1: some warnings being treated as errors
lto-wrapper: fatal error: //usr/bin/x86_64-pc-linux-gnu-gcc returned 1 exit 
status
compilation terminated.
/usr/lib/gcc/x86_64-pc-linux-gnu/12/../../../../x86_64-pc-linux-gnu/bin/ld: 
error: lto-wrapper failed
collect2: error: ld returned 1 exit status
make[3]: *** [Makefile:1514: ginstall-info] Error 1
```

This is with GCC 12.2.1 20221203.

We've also seen this in GNU make, so not sure if it's a
gnulib problem or not, as it may be in lib/error.h (hence CCing bug-gnulib):
- https://bugs.gentoo.org/863713 (texinfo)
- https://bugs.gentoo.org/863824 (make)

Best,
sam

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