OK, this should work to detect Sun Studio cc.

diff --git a/configure.ac b/configure.ac
index bb1528f..2c5c03f 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -106,10 +106,10 @@ AC_PROG_CC
 AM_PROG_CC_C_O
 
 dnl Use -v and some other options with SunStudio cc.
-dnl case `cc -V` in
-dnl   cc:\ Sun\ C*) CFLAGS="${CFLAGS:+$CFLAGS }-v -errtags=yes"
-dnl                CFLAGS="${CFLAGS} -erroff=E_STATEMENT_NOT_REACHED" ;;
-dnl esac
+case `${CC} -V 2>/dev/null` in
+  cc:\ Sun\ C*) CFLAGS="${CFLAGS:+$CFLAGS }-v -errtags=yes"
+                CFLAGS="${CFLAGS} -erroff=E_STATEMENT_NOT_REACHED" ;;
+esac
 
 AC_CACHE_CHECK([whether compiler supports -Wextra], [nmh_cv_has_wextra],
 [nmh_saved_cflags="$CFLAGS"