X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=acinclude.m4;h=42ae613bfb88b4fe6d390fd0dcd05e93b764d5cb;hb=fcd8d5f89fe81347a0e4ab4e5256fb89d6bb61c1;hp=aa6e4d77b3ea756eb24deb1d675b2de20a3b7964;hpb=009350385d97d9fba2b33ea68cfe8b1aeebf1529;p=pspp-builds.git

diff --git a/acinclude.m4 b/acinclude.m4
index aa6e4d77..42ae613b 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -3,85 +3,21 @@ dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
 
-dnl Check longest integer in digits.
-
-AC_DEFUN([BLP_INT_DIGITS],
+dnl Check whether a warning flag is accepted.
+dnl If so, add it to CFLAGS.
+dnl Example: PSPP_ENABLE_WARNING(-Wdeclaration-after-statement)
+AC_DEFUN([PSPP_ENABLE_WARNING],
 [
-AC_MSG_CHECKING(number of digits in LONG_MIN (incl. sign))
-AC_CACHE_VAL(blp_int_digits,
-	     [AC_TRY_RUN([#include <stdio.h>
-                          #include <limits.h>
-			  int
-			  main()
-			  {
-			    int len;
-			    char s[80];
-			    sprintf(s, "%ld", LONG_MAX);
-			    len = strlen(s);
-			    sprintf(s, "%ld", LONG_MIN);
-			    if(strlen(s)>len) len=strlen(s);
-			    sprintf(s, "%lu", ULONG_MAX);
-			    if(strlen(s)>len) len=strlen(s);
-			    exit(len);
-			  }
-			 ],
-			 eval "blp_int_digits=19",
-			 eval "blp_int_digits=$?"
-			 if test "$blp_int_digits" -lt 11; then
-			   blp_int_digits=11
-			 fi,
-			 eval "blp_int_digits=19")
-	     ])
-AC_DEFINE_UNQUOTED([INT_DIGITS], $blp_int_digits,
-	[Number of digits in longest `long' value, including sign.
-         This is usually 11, for 32-bit `long's, or 19, for 64-bit
-         `long's.])
-AC_MSG_RESULT($blp_int_digits) ])dnl
-
-dnl Check quality of this machine's sprintf implementation.
-
-AC_DEFUN([BLP_IS_SPRINTF_GOOD],
-[
-AC_MSG_CHECKING(if sprintf returns a char count)
-AC_CACHE_VAL(blp_is_sprintf_good,
-             [AC_TRY_RUN([#include <stdio.h>
-                          int 
-                          main()
-                          {
-                            char s[8];
-                            exit((int)sprintf(s, "abcdefg")!=7);
-                          }
-                         ], 
-                         eval "blp_is_sprintf_good=yes",
-			 eval "blp_is_sprintf_good=no",
-			 eval "blp_is_sprintf_good=no")
-             ])
-if test "$blp_is_sprintf_good" = yes; then
-  AC_DEFINE([HAVE_GOOD_SPRINTF], 1, 
-	[Define if sprintf() returns the number of characters written
-         to the destination string, excluding the null terminator.])
-  AC_MSG_RESULT(yes)
-else
-  AC_MSG_RESULT(no)
-fi
-])dnl
-
-dnl Check for proper random number generator.
-
-AC_DEFUN([BLP_RANDOM],
-[
-AC_MSG_CHECKING(random number generator)
-AC_CACHE_VAL(blp_random_good, 
-  AC_TRY_COMPILE([#include <stdlib.h>], [int x=RAND_MAX;], 
-    blp_random_good=yes, blp_random_good=no))
-if test "$blp_random_good" = yes; then
-  AC_DEFINE([HAVE_GOOD_RANDOM], 1, 
-	[Define if rand() and company work according to ANSI.])
-  AC_MSG_RESULT(good)
-else
-  AC_MSG_RESULT(bad)
-fi
-])dnl
+  m4_define([pspp_cv_name], [pspp_cv_[]m4_translit([$1], [-], [_])])dnl
+  AC_CACHE_CHECK([whether $CC accepts $1], [pspp_cv_name], 
+    [pspp_save_CFLAGS="$CFLAGS"
+     CFLAGS="$CFLAGS $1"
+     AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [pspp_cv_name[]=yes], [pspp_cv_name[]=no])
+     CFLAGS="$pspp_save_CFLAGS"])
+  if test $pspp_cv_name = yes; then
+    CFLAGS="$CFLAGS $1"
+  fi
+])
 
 dnl Check for readline and history libraries.