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[sr #110362] STRERROR_R_CHAR_P broken by 326c9a547423d25c621bc5c0ef76edb

From: anonymous
Subject: [sr #110362] STRERROR_R_CHAR_P broken by 326c9a547423d25c621bc5c0ef76edbf6eda8c92
Date: Wed, 4 Nov 2020 16:08:52 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.111 Safari/537.36


                 Summary: STRERROR_R_CHAR_P broken by
                 Project: Autoconf
            Submitted by: None
            Submitted on: Wed 04 Nov 2020 09:08:51 PM UTC
                Category: None
                Priority: 5 - Normal
                Severity: 3 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
        Originator Email: pterjan@gmail.com
             Open/Closed: Open
         Discussion Lock: Any
        Operating System: GNU/Linux



detection fails because <string.h> is no longer included.

checking whether strerror_r is declared... yes
checking whether strerror_r returns char *... no

configure:11444: x86_64-mageia-linux-gnu-gcc -c -O2 -g -pipe -Wformat
-Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 -fstack-protector
--param=ssp-buffer-size=4 -fstack-protector-all
-fasynchronous-unwind-tables -I/usr/include/et -fPIC
-fno-strict-aliasing -fstack-protector-all -I/usr/include/et
conftest.c >&5
conftest.c: In function 'main':
conftest.c:77:14: warning: implicit declaration of function
'strerror_r' [-Wimplicit-function-declaration]
   77 |    char x = *strerror_r (0, buf, sizeof buf);
      |              ^~~~~~~~~~
conftest.c:77:13: error: invalid type argument of unary '*' (have 'int')
   77 |    char x = *strerror_r (0, buf, sizeof buf);
      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
conftest.c:78:14: warning: initialization of 'char *' from 'int' makes
pointer from integer without a cast [-Wint-conversion]
   78 |    char *p = strerror_r (0, buf, sizeof buf);
      |              ^~~~~~~~~~
configure:11444: $? = 1

The suspicious part of the commit is:



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