X-Git-Url: https://diplodocus.org/git/nmh/blobdiff_plain/959dbc18d02cb81512ee2d0904b76e9287c95ee4..81661ad29fa62d2bbf7bdb4b499d65efb07954dc:/configure.ac?ds=inline

diff --git a/configure.ac b/configure.ac
index f206b809..6d140bc2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -92,105 +92,104 @@ dnl CHECK THE COMPILER
 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 "$LDFLAGS" && LDFLAGS=-g
-fi
-
-dnl Use SunStudio cc, with -v, on Solaris if user didn't set CC.
-if test -z "$CC"  -a  -d /opt/solarisstudio12.3/bin; then
-  CC=/opt/solarisstudio12.3/bin/cc; export CC
-  ${CC} -V
-  CFLAGS="${CFLAGS:+$CFLAGS }-v"
-fi
+test -z "$CFLAGS"  &&  auto_cflags=1
 
-AC_PROG_CC
+AC_PROG_CC([cc gcc])
 AM_PROG_CC_C_O
 
-AC_CACHE_CHECK([whether compiler supports -Wextra], [nmh_cv_has_wextra],
-[nmh_saved_cflags="$CFLAGS"
- CFLAGS="$CFLAGS -Wextra -Werror"
- AC_TRY_COMPILE([],[],nmh_cv_has_wextra=yes,nmh_cv_has_wextra=no)
- CFLAGS="$nmh_saved_cflags"])
+dnl ----------------
+dnl CUSTOMIZE CFLAGS
+dnl ----------------
+if test -n "$auto_cflags"; then
+  dnl The user didn't specify CFLAGS, so customize them.
+  if test "$GCC" = yes; then
+    dnl Can't use -ansi with gcc 4.5.3 on Cygwin, at least through setup
+    dnl version 2.763, because it disables some features in the system
+    dnl header files and warns about them with -Wall.  Try to test for
+    dnl that generally, with gcc.
+    AC_CACHE_CHECK([whether we can use -ansi with gcc], [nmh_cv_has_dash_ansi],
+      [nmh_saved_cppflags="$CPPFLAGS"
+       nmh_saved_cflags="$CFLAGS"
+       CPPFLAGS="-D_GNU_SOURCE"
+       CFLAGS="-ansi -Wall -Werror"
+       AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <time.h>],[tzset();])],
+         [nmh_cv_has_dash_ansi=yes],
+         [nmh_cv_has_dash_ansi=no])
+       CPPFLAGS="$nmh_saved_cppflags"
+       CFLAGS="$nmh_saved_cflags"])
+    test "$nmh_cv_has_dash_ansi" = "yes"  &&  \
+      CFLAGS="${CFLAGS:+$CFLAGS }-ansi -pedantic"
+  else
+    dnl Use -v and some other options with SunStudio cc.  lex produces
+    dnl code that causes unreachable-statement warnings.  It might be
+    dnl better to use an autoconf test, except -v will probably succeed
+    dnl with many other compilers but have different meaning.
+    AS_CASE([`${CC} -V 2>&1`],
+            [cc:\ Sun\ C*], [CFLAGS=\
+"${CFLAGS:+$CFLAGS }-v -errtags=yes -erroff=E_STATEMENT_NOT_REACHED"])
+  fi
+
+  AC_CACHE_CHECK([whether compiler supports -Wall], [nmh_cv_has_wall],
+                 [nmh_saved_cflags="$CFLAGS"
+                 CFLAGS="$CFLAGS -Wall -Werror"
+                 AC_TRY_COMPILE([],[],nmh_cv_has_wall=yes,nmh_cv_has_wall=no)
+                 CFLAGS="$nmh_saved_cflags"])
+  test "$nmh_cv_has_wall" = "yes"  &&  CFLAGS="${CFLAGS:+$CFLAGS }-Wall"
+
+  AC_CACHE_CHECK([whether compiler supports -Wextra], [nmh_cv_has_wextra],
+                 [nmh_saved_cflags="$CFLAGS"
+                 CFLAGS="$CFLAGS -Wextra -Werror"
+                 AC_TRY_COMPILE([],[],nmh_cv_has_wextra=yes,
+                                nmh_cv_has_wextra=no)
+                 CFLAGS="$nmh_saved_cflags"])
+  test "$nmh_cv_has_wextra" = "yes"  &&  CFLAGS="${CFLAGS:+$CFLAGS }-Wextra"
+fi
 
-dnl Can't use -ansi with gcc 4.5.3 on Cygwin, at least through setup
-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"
-     nmh_saved_cflags="$CFLAGS"
-     CPPFLAGS="-D_GNU_SOURCE"
-     CFLAGS="-ansi -Wall -Werror"
-     AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <time.h>],[tzset();])],
-       [nmh_cv_has_dash_ansi=yes],
-       [nmh_cv_has_dash_ansi=no])
-     CPPFLAGS="$nmh_saved_cppflags"
-     CFLAGS="$nmh_saved_cflags"])
+dnl --------------
+dnl CUSTOMIZE LINK
+dnl --------------
+if test `uname` = OpenBSD; then
+  dnl Filter out "often/almost always misused" warnings from OpenBSD linker.
+  [POSTLINK="2>&1 | egrep -v ': [w]arning: s[a-z]+\(\) is \
+(almost always|often) misused, please use'; true"]
+fi
+AC_SUBST([POSTLINK])
 
+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"])
-
-  if test "$nmh_cv_has_q_unused_arguments" = "yes"; then
-    test -z "$LDFLAGS" && LDFLAGS=-Qunused-arguments \
-                       || LDFLAGS="$LDFLAGS -Qunused-arguments"
-  fi
-else
-  nmh_cv_has_dash_ansi=no
+                 [nmh_saved_ldflags="$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 if the user hasn't specified CFLAGS, then
-dnl   if compiler is gcc, then
-dnl    use -O2 and some warning flags
-dnl   else use -O
-dnl We use -Wall and -Wextra if supported.  If the compiler supports it we
-dnl also use -Wno-pointer-sign, because gcc 4 now produces a lot of new
-dnl warnings which are probably mostly spurious and which in any case we
-dnl don't want to deal with now.
-if test "$nmh_cv_has_dash_ansi" = "yes"; then
-    nmh_gcc_warnflags="-ansi -pedantic -Wall"
+dnl This really shouldn't be necessary.  And we really shouldn't add -s.
+if test x"$enable_debug" = x"yes"; then
+  test -z "$LDFLAGS" && LDFLAGS=-g
 else
-    nmh_gcc_warnflags="-Wall"
-fi
-if test "$nmh_cv_has_wextra" = "yes"; then
-    nmh_gcc_warnflags="${nmh_gcc_warnflags} -Wextra"
-fi
-
-if test -n "$auto_cflags"; then
-  if test x"$enable_debug" = x"yes"; then
-    if test -n "$GCC"; then
-      test -z "$CFLAGS" && CFLAGS="$nmh_gcc_warnflags -g" || CFLAGS="$CFLAGS $nmh_gcc_warnflags -g"
-    else
-      test -z "$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="$CFLAGS -O"
-    fi
-    AC_DEFINE([NDEBUG], [1],
-              [Define to disable run-time debugging and asserts.])
+  if test -z "$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 "$enable_assert"  &&  enable_assert=no
+
+AC_HEADER_ASSERT
+
 dnl ------------------
 dnl CHECK FOR PROGRAMS
 dnl ------------------
@@ -325,6 +324,19 @@ AC_CACHE_CHECK(what group owns the mail spool, nmh_cv_ls_mail_grp,
 MAIL_SPOOL_GRP=$nmh_cv_ls_mail_grp
 AC_SUBST(MAIL_SPOOL_GRP)dnl
 
+dnl ---------------------------------------------
+dnl CHECK FOR PROGRAM TO PROVIDE MIME TYPE STRING
+dnl ---------------------------------------------
+AS_IF([file --mime "${srcdir}"/configure >/dev/null 2>&1],
+      [AS_IF([file --brief --mime "${srcdir}"/configure >/dev/null 2>&1],
+             [nmh_mimetypeproc='"file --brief --mime"'],
+             [nmh_mimetypeproc='"file --mime"'])])
+AS_CASE([$nmh_mimetypeproc], [?*],
+        [AC_DEFINE_UNQUOTED([MIMETYPEPROC], [$nmh_mimetypeproc],
+          [Program, with arguments, that provides MIME type string.])])
+AS_ECHO_N(["AS_ESCAPE([checking program to provide MIME type string ... ])"])
+AS_ECHO(["AS_ESCAPE([$nmh_mimetypeproc], [""])"])
+
 dnl ------------------
 dnl CHECK HEADER FILES
 dnl ------------------
@@ -359,7 +371,7 @@ AC_CHECK_HEADER([sys/ptem.h], AC_DEFINE(WINSIZE_IN_PTEM,1,
 dnl ---------------
 dnl CHECK FUNCTIONS
 dnl ---------------
-AC_CHECK_FUNCS([wcwidth mbtowc writev lstat nl_langinfo getutxent])
+AC_CHECK_FUNCS([wcwidth mbtowc writev lstat nl_langinfo getutxent arc4random])
 
 dnl Check for multibyte character set support
 AS_IF([test "x$ac_cv_header_wchar_h" = "xyes" -a \
@@ -581,14 +593,16 @@ dnl ----------------
 dnl CHECK FLEX FIXUP
 dnl ----------------
 dnl Use LFLAGS make variable setting to work around bugs in flex
-dnl 2.5.35-37 that cause signed/unsigned mismatch,
+dnl 2.5.36 that cause signed/unsigned mismatch,
 dnl http://sourceforge.net/p/flex/bugs/140/
 AS_IF([test "$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 $@; \
+true'],
+               [flex\ 2.5.36], [LFLAGS=\
+'; printf "%s\n" '\''1,$$s/\(	\)int i;/\1yy_size_t i;/'\'' w q | ed -s $@; \
+true'])
        AC_SUBST([LFLAGS])])
 
 dnl --------------