From: Arnaud Rebillout Date: Mon, 15 Apr 2024 15:07:55 +0700 Subject: acinclude.m4: Fix -Werror=implicit-function-declaration ``` checking snprintf format for long long int... none configure: error: cannot determine snprintf format string for long long int ... configure:5765: checking snprintf format for long long int configure:5803: gcc -o conftest -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/<>=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -Wshadow -Wwrite-strings -Wextra -fstack-protector -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2 -Wl,-z,relro -Wl,-z,now conftest.c >&5 conftest.c: In function 'does_int64_snprintf_work': conftest.c:58:7: error: implicit declaration of function 'strcmp' [-Werror=implicit-function-declaration] 58 | if (strcmp(buf, "800000140000005") != 0) | ^~~~~~ conftest.c:42:1: note: include '' or provide a declaration of 'strcmp' 41 | #include +++ |+#include 42 | typedef long long int int64; conftest.c: At top level: conftest.c:62:1: warning: return type defaults to 'int' [-Wimplicit-int] 62 | main() { | ^~~~ cc1: some warnings being treated as errors ``` Initially reported on the Debian bugtracker: https://bugs.debian.org/1065969 Forwarded: https://github.com/royhills/ike-scan/pull/40 --- acinclude.m4 | 1 + 1 file changed, 1 insertion(+) diff --git a/acinclude.m4 b/acinclude.m4 index 5ab3172..2b2bd9e 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -167,6 +167,7 @@ AC_DEFUN([PGAC_FUNC_SNPRINTF_LONG_LONG_INT_FORMAT], AC_CACHE_VAL(pgac_cv_snprintf_long_long_int_format, [for pgac_format in '%lld' '%qd' '%I64d'; do AC_RUN_IFELSE([AC_LANG_SOURCE([[#include +#include typedef long long int int64; #define INT64_FORMAT "$pgac_format"