Following the glibc commit glibc-2.38~268 ("libio: Add __nonnull for FILE * arguments of fclose and freopen"), the utilization of the gcc -fanalyzer flag in combination with the -Werror flag leads to an error within the _AC_LANG_IO_PROGRAM(C) function:
conftest.c:14:23: error: use of possibly-NULL 'f' where non-null expected [CWE-690] [-Werror=analyzer-possible-null-argument] * lib/autoconf/c.m4 (_AC_LANG_IO_PROGRAM): Exit upon encountering fopen() error. See also https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109570 and https://gcc.gnu.org/g:c9a19621a07e246385ae075b61283140b23c3b5a . Tiny-change: yes --- lib/autoconf/c.m4 | 2 ++ 1 file changed, 2 insertions(+) diff --git a/lib/autoconf/c.m4 b/lib/autoconf/c.m4 index b8350c33..77ff1af8 100644 --- a/lib/autoconf/c.m4 +++ b/lib/autoconf/c.m4 @@ -114,6 +114,8 @@ $2 m4_define([_AC_LANG_IO_PROGRAM(C)], [AC_LANG_PROGRAM([@%:@include <stdio.h>], [FILE *f = fopen ("conftest.out", "w"); + if (!f) + return 1; return ferror (f) || fclose (f) != 0; ])]) -- glebfm