[Bug c/28485] New: no prototype in stdlib.h for mkstemp()

["robert-gcc at pine-ridge dot ca" <gcc-bugzilla at gcc dot gnu dot org>]

Attempting to use mkstemp() with the -Wall argument specified, the message
"bug.c:8: warning: implicit declaration of function ‘mkstemp’" is
issued
even though stdlib.h is #included. The sample program is stripped to the bones
so there is little extraneous material. Below is the compiler with options as
requested:

$ gcc -c bug.c -ansi -Wall -v -save-temps
Using built-in specs.
Target: i386-redhat-linux
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --enable-shared --enable-threads=posix
--enable-checking=release --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions --enable-libgcj-multifile
--enable-languages=c,c++,objc,obj-c++,java,fortran,ada --enable-java-awt=gtk
--disable-dssi --with-java-home=/usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre
--with-cpu=generic --host=i386-redhat-linux
Thread model: posix
gcc version 4.1.1 20060525 (Red Hat 4.1.1-1)
 /usr/libexec/gcc/i386-redhat-linux/4.1.1/cc1 -E -quiet -v bug.c -mtune=generic
-ansi -Wall -fpch-preprocess -o bug.i
ignoring nonexistent directory
"/usr/lib/gcc/i386-redhat-linux/4.1.1/../../../../i386-redhat-linux/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include
 /usr/lib/gcc/i386-redhat-linux/4.1.1/include
 /usr/include
End of search list.
 /usr/libexec/gcc/i386-redhat-linux/4.1.1/cc1 -fpreprocessed bug.i -quiet
-dumpbase bug.c -mtune=generic -ansi -auxbase bug -Wall -ansi -version -o bug.s
GNU C version 4.1.1 20060525 (Red Hat 4.1.1-1) (i386-redhat-linux)
        compiled by GNU C version 4.1.1 20060525 (Red Hat 4.1.1-1).
GGC heuristics: --param ggc-min-expand=63 --param ggc-min-heapsize=62486
Compiler executable checksum: 7a31534f101210f86e6343d2c0c239f8
bug.c: In function &#8216;main&#8217;:
bug.c:8: warning: implicit declaration of function &#8216;mkstemp&#8217;
 as -V -Qy -o bug.o bug.s
GNU assembler version 2.16.91.0.6 (i386-redhat-linux) using BFD version
2.16.91.0.6 20060212


-- 
           Summary: no prototype in stdlib.h for mkstemp()
           Product: gcc
           Version: 4.1.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: robert-gcc at pine-ridge dot ca
 GCC build triplet: ???
  GCC host triplet: ???
GCC target triplet: ???


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28485