Add the ability to GCC_NEED_DECLARATION{S} for looking in arbitrary header...

Add the ability to GCC_NEED_DECLARATION{S} for looking in arbitrary
header files when searching for function declarations.  Use this
functionality to check for getrlimit/setrlimit.
        * aclocal.m4 (GCC_NEED_DECLARATION): Accept an optional second
        argument, which is typically preprocessor code used to draw in
        additional header files when looking for a function declaration.
        (GCC_NEED_DECLARATIONS): Likewise.
        * configure.in (GCC_NEED_DECLARATIONS): Add checks for getrlimit
        and setrlimit, search for them in sys/resource.h.
        * acconfig.h: Add stubs for NEED_DECLARATION_GETRLIMIT and
        NEED_DECLARATION_SETRLIMIT.
        * system.h: Prototype getrlimit/setrlimit if necessary.

From-SVN: r20831

gcc/ChangeLog

+Tue Jun 30 14:03:34 1998  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* aclocal.m4 (GCC_NEED_DECLARATION): Accept an optional second
+	argument, which is typically preprocessor code used to draw in
+	additional header files when looking for a function declaration.
+	(GCC_NEED_DECLARATIONS): Likewise.
+
+	* configure.in (GCC_NEED_DECLARATIONS): Add checks for getrlimit
+	and setrlimit, search for them in sys/resource.h.
+
+	* acconfig.h: Add stubs for NEED_DECLARATION_GETRLIMIT and
+	NEED_DECLARATION_SETRLIMIT.
+
+	* system.h: Prototype getrlimit/setrlimit if necessary.
+
 Tue Jun 30 10:54:48 1998  Mark Mitchell  <mark@markmitchell.com>
 
 	* rtl.texi: Don't say that RTX_INTEGRATED_P is unused.

gcc/acconfig.h

@@ -65,6 +65,12 @@
 /* Whether getwd must be declared even if <unistd.h> is included.  */
 #undef NEED_DECLARATION_GETWD
 
+/* Whether getrlimit must be declared even if <sys/resource.h> is included.  */
+#undef NEED_DECLARATION_GETRLIMIT
+
+/* Whether setrlimit must be declared even if <sys/resource.h> is included.  */
+#undef NEED_DECLARATION_SETRLIMIT
+
 /* Define if you want expensive run-time checks. */
 #undef ENABLE_CHECKING
 @TOP@

gcc/aclocal.m4

 dnl See whether we need a declaration for a function.
+dnl GCC_NEED_DECLARATION(FUNCTION [, EXTRA-HEADER-FILES])
 AC_DEFUN(GCC_NEED_DECLARATION,
 [AC_MSG_CHECKING([whether $1 must be declared])
 AC_CACHE_VAL(gcc_cv_decl_needed_$1,
@@ -22,7 +23,8 @@ AC_CACHE_VAL(gcc_cv_decl_needed_$1,
 #endif
 #ifndef HAVE_INDEX
 #define index strchr
-#endif],
+#endif
+$2],
 [char *(*pfn) = (char *(*)) $1],
 eval "gcc_cv_decl_needed_$1=no", eval "gcc_cv_decl_needed_$1=yes")])
 if eval "test \"`echo '$gcc_cv_decl_needed_'$1`\" = yes"; then
@@ -35,10 +37,11 @@ fi
 ])dnl
 
 dnl Check multiple functions to see whether each needs a declaration.
+dnl GCC_NEED_DECLARATIONS(FUNCTION... [, EXTRA-HEADER-FILES])
 AC_DEFUN(GCC_NEED_DECLARATIONS,
 [for ac_func in $1
 do
-GCC_NEED_DECLARATION($ac_func)
+GCC_NEED_DECLARATION($ac_func, $2)
 done
 ])
 

gcc/config.in

@@ -66,6 +66,15 @@
 /* Whether getwd must be declared even if <unistd.h> is included.  */
 #undef NEED_DECLARATION_GETWD
 
+/* Whether getrlimit must be declared even if <sys/resource.h> is included.  */
+#undef NEED_DECLARATION_GETRLIMIT
+
+/* Whether setrlimit must be declared even if <sys/resource.h> is included.  */
+#undef NEED_DECLARATION_SETRLIMIT
+
+/* Define if you want expensive run-time checks. */
+#undef ENABLE_CHECKING
+
 /* Define if you don't have vprintf but do have _doprnt.  */
 #undef HAVE_DOPRNT
 

gcc/configure

@@ -1976,11 +1976,78 @@ else
 #ifndef HAVE_INDEX
 #define index strchr
 #endif
+
+int main() {
+char *(*pfn) = (char *(*)) $ac_func
+; return 0; }
+EOF
+if { (eval echo configure:1985: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+  rm -rf conftest*
+  eval "gcc_cv_decl_needed_$ac_func=no"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "gcc_cv_decl_needed_$ac_func=yes"
+fi
+rm -f conftest*
+fi
+
+if eval "test \"`echo '$gcc_cv_decl_needed_'$ac_func`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+  gcc_tr_decl=NEED_DECLARATION_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+  cat >> confdefs.h <<EOF
+#define $gcc_tr_decl 1
+EOF
+
+else
+  echo "$ac_t""no" 1>&6
+fi
+
+done
+
+
+for ac_func in getrlimit setrlimit
+do
+echo $ac_n "checking whether $ac_func must be declared""... $ac_c" 1>&6
+echo "configure:2014: checking whether $ac_func must be declared" >&5
+if eval "test \"`echo '$''{'gcc_cv_decl_needed_$ac_func'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 2019 "configure"
+#include "confdefs.h"
+
+#include <stdio.h>
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#ifndef HAVE_RINDEX
+#define rindex strrchr
+#endif
+#ifndef HAVE_INDEX
+#define index strchr
+#endif
+#include <sys/types.h>
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+
 int main() {
 char *(*pfn) = (char *(*)) $ac_func
 ; return 0; }
 EOF
-if { (eval echo configure:1984: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2051: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   eval "gcc_cv_decl_needed_$ac_func=no"
 else
@@ -2007,12 +2074,12 @@ done
 
 
 echo $ac_n "checking for sys_siglist declaration in signal.h or unistd.h""... $ac_c" 1>&6
-echo "configure:2011: checking for sys_siglist declaration in signal.h or unistd.h" >&5
+echo "configure:2078: checking for sys_siglist declaration in signal.h or unistd.h" >&5
 if eval "test \"`echo '$''{'ac_cv_decl_sys_siglist'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2016 "configure"
+#line 2083 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <signal.h>
@@ -2024,7 +2091,7 @@ int main() {
 char *msg = *(sys_siglist + 1);
 ; return 0; }
 EOF
-if { (eval echo configure:2028: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:2095: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_decl_sys_siglist=yes
 else
@@ -5147,7 +5214,7 @@ fi
 
 # Figure out what assembler alignment features are present.
 echo $ac_n "checking assembler alignment features""... $ac_c" 1>&6
-echo "configure:5151: checking assembler alignment features" >&5
+echo "configure:5218: checking assembler alignment features" >&5
 gcc_cv_as=
 gcc_cv_as_alignment_features=
 if [ -x as$host_exeext ]; then

gcc/configure.in

@@ -199,6 +199,13 @@ GCC_FUNC_PRINTF_PTR
 GCC_NEED_DECLARATIONS(malloc realloc calloc free bcopy bzero bcmp \
 	index rindex getenv atol sbrk abort atof strerror getcwd getwd)
 
+GCC_NEED_DECLARATIONS(getrlimit setrlimit, [
+#include <sys/types.h>
+#ifdef HAVE_SYS_RESOURCE_H
+#include <sys/resource.h>
+#endif
+])
+
 AC_DECL_SYS_SIGLIST
 
 # File extensions

gcc/system.h

@@ -235,6 +235,22 @@ extern int sys_nerr;
 extern char *sys_errlist[];
 #endif /* HAVE_STRERROR */
 
+#ifdef HAVE_GETRLIMIT
+# ifdef NEED_DECLARATION_GETRLIMIT
+#  ifndef getrlimit
+extern int getrlimit ();
+#  endif
+# endif
+#endif
+
+#ifdef HAVE_SETRLIMIT
+# ifdef NEED_DECLARATION_SETRLIMIT
+#  ifndef setrlimit
+extern int setrlimit ();
+#  endif
+# endif
+#endif
+
 /* HAVE_VOLATILE only refers to the stage1 compiler.  We also check
    __STDC__ and assume gcc sets it and has volatile in stage >=2. */
 #if !defined(HAVE_VOLATILE) && !defined(__STDC__) && !defined(volatile)