Removed a bunch of unreachable break statements found by

[nmh] / configure.ac

diff --git a/configure.ac b/configure.ac
index c007b0c831e95de19387988727c1d00fc6e7d147..f206b8092c36462a062d3d172d788fc747a4b65d 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -97,6 +97,13 @@ 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
+
 AC_PROG_CC
 AM_PROG_CC_C_O
 
@@ -107,9 +114,9 @@ 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"
@@ -121,6 +128,20 @@ 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="$LDFLAGS -Qunused-arguments"
+  fi
 else
   nmh_cv_has_dash_ansi=no
 fi
@@ -565,7 +586,7 @@ dnl http://sourceforge.net/p/flex/bugs/140/
 AS_IF([test "$LEX" = flex],
       [AS_CASE([`$LEX -V`],
                [flex\ 2.5.35], [[LFLAGS=\
-'; cp -p $@ $@.ORIGINAL; printf "%s\n" '\''1,$$s/(size_t) \(num_to_read\)/\1/'\'' w q | ed -s $@; diff $@ $@.ORIGINAL || true']])
+'; 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])])