1 files changed, 100 insertions, 0 deletions
diff --git a/ares/acinclude.m4 b/ares/acinclude.m4
new file mode 100644
index 000000000..76ff0deef
--- /dev/null
+++ b/ares/acinclude.m4
@@ -0,0 +1,100 @@
+
+dnl We create a function for detecting which compiler we use and then set as
+dnl pendantic compiler options as possible for that particular compiler. The
+dnl options are only used for debug-builds.
+
+dnl This is a copy of the original found in curl's configure script. Don't
+dnl modify this one, edit the one in curl and copy it back here when that one
+dnl is changed.
+
+AC_DEFUN([CURL_CC_DEBUG_OPTS],
+[
+    if test "$GCC" = "yes"; then
+
+       dnl figure out gcc version!
+       AC_MSG_CHECKING([gcc version])
+       gccver=`$CC -dumpversion`
+       num1=`echo $gccver | cut -d . -f1`
+       num2=`echo $gccver | cut -d . -f2`
+       gccnum=`(expr $num1 "*" 100 + $num2) 2>/dev/null`
+       AC_MSG_RESULT($gccver)
+
+       AC_MSG_CHECKING([if this is icc in disguise])
+       AC_EGREP_CPP([^__ICC], [__ICC],
+         dnl action if the text is found, this it has not been replaced by the
+         dnl cpp
+         [ICC="no"]
+         AC_MSG_RESULT([no]),
+         dnl the text was not found, it was replaced by the cpp
+         [ICC="yes"]
+         AC_MSG_RESULT([yes])
+       )
+
+       if test "$ICC" = "yes"; then
+         dnl this is icc, not gcc.
+
+         dnl Warning 279 warns on static conditions in while expressions,
+         dnl ignore that.
+
+         WARN="-wd279"
+
+         if test "$gccnum" -gt "600"; then
+            dnl icc 6.0 and older doesn't have the -Wall flag, although it does
+            dnl have -wd<n>
+            WARN="-Wall $WARN"
+         fi
+       else dnl $ICC = yes
+         dnl 
+         WARN="-W -Wall -Wwrite-strings -pedantic -Wno-long-long -Wundef -Wpointer-arith -Wnested-externs -Winline -Wmissing-declarations -Wmissing-prototypes -Wsign-compare"
+
+         dnl -Wcast-align is a bit too annoying ;-)
+
+         if test "$gccnum" -ge "296"; then
+           dnl gcc 2.96 or later
+           WARN="$WARN -Wfloat-equal"
+
+           if test "$gccnum" -gt "296"; then
+             dnl this option does not exist in 2.96
+             WARN="$WARN -Wno-format-nonliteral"
+           fi
+
+           dnl -Wunreachable-code seems totally unreliable on my gcc 3.3.2 on
+           dnl on i686-Linux as it gives us heaps with false positives
+           if test "$gccnum" -ge "303"; then
+             dnl gcc 3.3 and later
+             WARN="$WARN -Wendif-labels -Wstrict-prototypes"
+           fi
+         fi
+
+         for flag in $CPPFLAGS; do
+           case "$flag" in
+            -I*)
+              dnl include path
+              add=`echo $flag | sed 's/^-I/-isystem /g'`
+              WARN="$WARN $add"
+              ;;
+           esac
+         done
+
+       fi dnl $ICC = no
+
+       CFLAGS="$CFLAGS $WARN"
+
+    fi dnl $GCC = yes
+
+    dnl strip off optimizer flags
+    NEWFLAGS=""
+    for flag in $CFLAGS; do
+      case "$flag" in
+      -O*)
+        dnl echo "cut off $flag"
+        ;;
+      *)
+        NEWFLAGS="$NEWFLAGS $flag"
+        ;;
+      esac
+    done
+    CFLAGS=$NEWFLAGS
+
+]) dnl end of AC_DEFUN()
+