[BUGS] ./configure error: Cannot find a working 64-bit integer type

Hello,

unless the patch below is applied ./configure prints:

STDOUT checking test program... ok
STDOUT checking whether long int is 64 bits... no
STDOUT checking whether long long int is 64 bits... no
STDERR configure: error: Cannot find a working 64-bit integer type.

when gcc 8.0.0 20171006 is used, "unset CFLAGS" is removed from configure(.in),  having in config.site:

CFLAGS="-pipe -Werror -Wall -Wextra -O3 -fno-fat-lto-objects -flto"
LDFLAGS="-Wl,-O1,-s -flto=12"

and calling
PYTHON=/usr/local/bin/python3 ./configure --prefix=/usr/local --with-gssapi --with-openssl --with-libxml --with-libxslt
--with-python--enable-cassert
 

config.log contains then:

configure:14132: checking whether long long int is 64 bits
configure:14192: gcc -o conftest -Wall -Wmissing-prototypes -Wpointer-arith -Wdeclaration-after-statement
-Wendif-label
conftest.c:154:5: error: no previous prototype for 'does_int64_work' [-Werror=missing-prototypes] int
does_int64_work(void)    ^~~~~~~~~~~~~~~
 
cc1: all warnings being treated as errors
configure:14192: $? = 1
configure: program exited with status 1
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "PostgreSQL"
| #define PACKAGE_TARNAME "postgresql"
[...]
|  */
| ac_int64 a = 20000001;
| ac_int64 b = 40000005;
| int does_int64_work()
| {
|   ac_int64 c,d;
|



diff --git a/config/c-compiler.m4 b/config/c-compiler.m4
index 6dcc790..dfaa273 100644
--- a/config/c-compiler.m4
+++ b/config/c-compiler.m4
@@ -56,8 +56,8 @@ AC_CACHE_CHECK([whether $1 is 64 bits], [Ac_cachevar],  */ ac_int64 a = 20000001; ac_int64 b =
40000005;
-
-int does_int64_work()
+int does_int64_work(void);
+int does_int64_work(void) {   ac_int64 c,d; 
Regards  Дилян


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