X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/70a3fbf967717678e2edd0fb2c992e5a2c59a2b0..a75b45f604c4e48b0f39be25ce59cd1955e5f9a4:/configure.ac?ds=sidebyside

diff --git a/configure.ac b/configure.ac
index 520c8d42..ce4b46d5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -93,13 +93,15 @@ dnl ------------------
 dnl We want these before the checks,
 dnl so the checks can modify their values.
 test -z "$CFLAGS" && CFLAGS= auto_cflags=1
-if test x"$enable_debug" = x"yes"; then
-  test -z "$LDFLAGS" && LDFLAGS=-g
-fi
 
-AC_PROG_CC
+AC_PROG_CC([cc gcc])
 AM_PROG_CC_C_O
 
+dnl Use -v and some other options with SunStudio cc.
+AS_CASE([`${CC} -V 2>&1`],
+	[cc:\ Sun\ C*], [CFLAGS="${CFLAGS:+$CFLAGS }-v -errtags=yes"
+			 CFLAGS="${CFLAGS} -erroff=E_STATEMENT_NOT_REACHED"])
+
 AC_CACHE_CHECK([whether compiler supports -Wextra], [nmh_cv_has_wextra],
 [nmh_saved_cflags="$CFLAGS"
  CFLAGS="$CFLAGS -Wextra -Werror"
@@ -107,9 +109,9 @@ AC_CACHE_CHECK([whether compiler supports -Wextra], [nmh_cv_has_wextra],
  CFLAGS="$nmh_saved_cflags"])
 
 dnl Can't use -ansi with gcc 4.5.3 on Cygwin, at least through setup
-dnl setup version 2.763, because it disables some features in the
-dnl system system header files and warns about them with -Wall.  Try
-dnl to test for that generally, though still with gcc.
+dnl version 2.763, because it disables some features in the system
+dnl header files and warns about them with -Wall.  Try to test for
+dnl that generally, though still with gcc.
 if test "$GCC" = yes; then
   AC_CACHE_CHECK([whether we can use -ansi with gcc], [nmh_cv_has_dash_ansi],
     [nmh_saved_cppflags="$CPPFLAGS"
@@ -121,20 +123,6 @@ if test "$GCC" = yes; then
        [nmh_cv_has_dash_ansi=no])
      CPPFLAGS="$nmh_saved_cppflags"
      CFLAGS="$nmh_saved_cflags"])
-
-  dnl Disable clang complaint about unused -ansi when linking.
-  AC_CACHE_CHECK([whether linker supports -Qunused-arguments],
-                 [nmh_cv_has_q_unused_arguments],
-    [nmh_saved_ldflags="$LDFLAGS"
-     LDFLAGS="$LDFLAGS -Qunused-arguments"
-     AC_TRY_LINK([],[],nmh_cv_has_q_unused_arguments=yes,
-                 nmh_cv_has_q_unused_arguments=no)
-     LDFLAGS="$nmh_saved_ldflags"])
-
-  if test "$nmh_cv_has_q_unused_arguments" = "yes"; then
-    test -z "$LDFLAGS" && LDFLAGS=-Qunused-arguments \
-                       || LDFLAGS="$LDFLAGS -Qunused-arguments"
-  fi
 else
   nmh_cv_has_dash_ansi=no
 fi
@@ -164,26 +152,49 @@ if test -n "$auto_cflags"; then
       test -z "$CFLAGS" && CFLAGS=-g || CFLAGS="$CFLAGS -g"
     fi
   else
-    if test -z "$LDFLAGS"; then
-      case "$build_os" in
-	darwin*)
- 	  LDFLAGS=
-          ;;
-	*)
-	  LDFLAGS=-s
-	  ;;
-      esac
-    fi
     if test -n "$GCC"; then
       test -z "$CFLAGS" && CFLAGS="$nmh_gcc_warnflags -O2" || CFLAGS="$CFLAGS $nmh_gcc_warnflags -O2"
     else
       test -z "$CFLAGS" && CFLAGS=-O  || CFLAGS="$CFLAGS -O"
     fi
-    AC_DEFINE([NDEBUG], [1],
-              [Define to disable run-time debugging and asserts.])
   fi
 fi
 
+dnl -----------------
+dnl CUSTOMIZE LDFLAGS
+dnl -----------------
+if test "$GCC" = yes; then
+  dnl Disable clang complaint about unused -ansi when linking.
+  AC_CACHE_CHECK([whether linker supports -Qunused-arguments],
+                 [nmh_cv_has_q_unused_arguments],
+                 [nmh_saved_ldflags="$LDFLAGS"
+                  LDFLAGS="$LDFLAGS -Qunused-arguments"
+                  AC_TRY_LINK([],[],nmh_cv_has_q_unused_arguments=yes,
+                                    nmh_cv_has_q_unused_arguments=no)
+                  LDFLAGS="$nmh_saved_ldflags"])
+  test "$nmh_cv_has_q_unused_arguments" = "yes"  &&  \
+    LDFLAGS="${LDFLAGS:+$LDFLAGS }-Qunused-arguments"
+fi
+
+dnl This really shouldn't be necessary.  And we really shouldn't add -s.
+if test x"$enable_debug" = x"yes"; then
+  test -z "$LDFLAGS" && LDFLAGS=-g
+else
+  if test -z "$LDFLAGS"; then
+    case "$build_os" in
+      darwin*) LDFLAGS= ;;
+            *) LDFLAGS=-s ;;
+    esac
+  fi
+fi
+
+dnl This hack turns off assertions by default, assuming
+dnl that configure still uses this shell variable.  Without
+dnl it, AC_HEADER_ASSERT enables assertions by default.
+test -z "$enable_assert"  &&  enable_assert=no
+
+AC_HEADER_ASSERT
+
 dnl ------------------
 dnl CHECK FOR PROGRAMS
 dnl ------------------
@@ -578,10 +589,10 @@ dnl 2.5.35-37 that cause signed/unsigned mismatch,
 dnl http://sourceforge.net/p/flex/bugs/140/
 AS_IF([test "$LEX" = flex],
       [AS_CASE([`$LEX -V`],
-               [flex\ 2.5.35], [[LFLAGS=\
-'; printf "%s\n" '\''1,$$s/(size_t) \(num_to_read\)/\1/'\'' w q | ed -s $@']],
-               [flex\ 2.5.3@<:@67@:>@], [[LFLAGS=\
-'; printf "%s\n" '\''1,$$s/\(	\)int i;/\1yy_size_t i;/'\'' w q | ed -s $@']])
+               [flex\ 2.5.35], [LFLAGS=\
+'; printf "%s\n" '\''1,$$s/(size_t) \(num_to_read\)/\1/'\'' w q | ed -s $@'],
+               [flex\ 2.5.3@<:@67@:>@], [LFLAGS=\
+'; printf "%s\n" '\''1,$$s/\(	\)int i;/\1yy_size_t i;/'\'' w q | ed -s $@'])
        AC_SUBST([LFLAGS])])
 
 dnl --------------