[PATCH] Fix some stdlib.h functions under __STRICT_ANSI__ and/or -std=c99

[Jon TURNEY <jon dot turney at dronecode dot org dot uk>]

The C99 functions strtoll and strtoull are not declared in stdlib.h when using
gcc -std=c99, as they are under !__STRICT_ANSI__.

The C99 functions strtof and strtold are declared in stdlib.h even when
__STRICT_ANSI__ is defined.

Attached is a patch to put these declarations under !defined(__STRICT_ANSI__)
|| (__STDC_VERSION__ >= 199901L).

$ cat c99-stdlib-test.c
#include <stdlib.h>

int main()
{
  strtoll("1234", NULL , 0);
  strtoull("1234", NULL, 0);
  strtof("1234", NULL);
  /* only available on platforms where long double equals double... */
  /* strtold("1234", NULL); */
  return 0;
}

before patch:

$ gcc c99-stdlib-test.c -std=c99 -Werror=implicit-function-declaration
c99-stdlib-test.c: In function ‘main’:
c99-stdlib-test.c:7:3: error: implicit declaration of function ‘strtoll’
c99-stdlib-test.c:8:3: error: implicit declaration of function ‘strtoull’

after patch:

$ gcc c99-stdlib-test.c -std=c99 -Werror=implicit-function-declaration

$ gcc c99-stdlib-test.c -std=c89 -Werror=implicit-function-declaration
c99-stdlib-test.c: In function ‘main’:
c99-stdlib-test.c:7:3: error: implicit declaration of function ‘strtoll’
c99-stdlib-test.c:8:3: error: implicit declaration of function ‘strtoull’
c99-stdlib-test.c:9:3: error: implicit declaration of function ‘strtof’

newlib/ChangeLog:

2012-10-19  Jon TURNEY  <jon.turney@dronecode.org.uk>

	* libc/include/stdlib.h (strtof, strtoll, strtoull, strtold):Prototype
	if not __STRICT_ANSI__ or stdc version C99 or greater.

Attachment: stdlib.h.patch
Description: Text document