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-rw-r--r--configure.in17
1 files changed, 13 insertions, 4 deletions
diff --git a/configure.in b/configure.in
index cab2f8d..588ab80 100644
--- a/configure.in
+++ b/configure.in
@@ -137,11 +137,20 @@ _DIFF_PATH=`echo $PATH:${prefix}/bin:/usr/bin:/usr/pkg/bin:/usr/local/bin:/usr/g
for _diff in ${_DIFF_PATH} ;
do
if test -e ${_diff}/diff ; then
- ${_diff}/diff -u /dev/null /dev/null > /dev/null 2>&1
+ ${_diff}/diff -u -4 /dev/null /dev/null > /dev/null 2>&1
if test $? -ne 0; then
- if test "${ADIFF}" == "" ; then
- ADIFF="${_diff}/diff"
- ADIFF_CMD="diff -c -4"
+ # linux/gnu shit has to change options that have been around
+ # since organized religion; see if -U 4 works.
+ ${_diff}/diff -U 4 /dev/null /dev/null > /dev/null 2>&1
+ if test $? -ne 0; then
+ if test "${ADIFF}" == "" ; then
+ ADIFF="${_diff}/diff"
+ ADIFF_CMD="diff -c -4"
+ fi
+ else
+ DIFF="${_diff}/diff"
+ DIFF_CMD="diff -U 4"
+ break
fi
else
DIFF="${_diff}/diff"