From: Marc Fournier <marc.fournier@camptocamp.com>
Date: Tue, 1 Nov 2016 10:54:26 +0000 (+0100)
Subject: configure.ac: make finding java deterministic
X-Git-Tag: collectd-5.5.3~7
X-Git-Url: https://git.octo.it/?p=collectd.git;a=commitdiff_plain;h=55ef2778ade050e2924eeb027c98feea103f1585

configure.ac: make finding java deterministic

The sort order of the `find` command proves to be dependent on external
factors, which makes `./configure` pick different java versions on
different systems, making the whole build non-reproducible (see
https://reproducible-builds.org/ for more details).

Adding a call to `sort`, with the locale forced, fixes this issue.

Fixes: #1523
---

diff --git a/configure.ac b/configure.ac
index d214d57a..c07687d2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2259,7 +2259,7 @@ then
 	if test -d "$with_java_home"
 	then
 		AC_MSG_CHECKING([for jni.h])
-		TMPVAR=`find -L "$with_java_home" -name jni.h -type f -exec 'dirname' '{}' ';' 2>/dev/null | head -n 1`
+		TMPVAR=`find -L "$with_java_home" -name jni.h -type f -exec 'dirname' '{}' ';' 2>/dev/null | LC_ALL=C sort | head -n 1`
 		if test "x$TMPVAR" != "x"
 		then
 			AC_MSG_RESULT([found in $TMPVAR])
@@ -2269,7 +2269,7 @@ then
 		fi
 
 		AC_MSG_CHECKING([for jni_md.h])
-		TMPVAR=`find -L "$with_java_home" -name jni_md.h -type f -exec 'dirname' '{}' ';' 2>/dev/null | head -n 1`
+		TMPVAR=`find -L "$with_java_home" -name jni_md.h -type f -exec 'dirname' '{}' ';' 2>/dev/null | LC_ALL=C sort | head -n 1`
 		if test "x$TMPVAR" != "x"
 		then
 			AC_MSG_RESULT([found in $TMPVAR])
@@ -2279,7 +2279,7 @@ then
 		fi
 
 		AC_MSG_CHECKING([for libjvm.so])
-		TMPVAR=`find -L "$with_java_home" -type f \( -name libjvm.so -o -name libjvm.dylib \) -exec 'dirname' '{}' ';' 2>/dev/null | head -n 1`
+		TMPVAR=`find -L "$with_java_home" -type f \( -name libjvm.so -o -name libjvm.dylib \) -exec 'dirname' '{}' ';' 2>/dev/null | LC_ALL=C sort | head -n 1`
 		if test "x$TMPVAR" != "x"
 		then
 			AC_MSG_RESULT([found in $TMPVAR])
@@ -2291,7 +2291,7 @@ then
 		if test "x$JAVAC" = "x"
 		then
 			AC_MSG_CHECKING([for javac])
-			TMPVAR=`find -L "$with_java_home" -name javac -type f 2>/dev/null | head -n 1`
+			TMPVAR=`find -L "$with_java_home" -name javac -type f 2>/dev/null | LC_ALL=C sort | head -n 1`
 			if test "x$TMPVAR" != "x"
 			then
 				JAVAC="$TMPVAR"
@@ -2303,7 +2303,7 @@ then
 		if test "x$JAR" = "x"
 		then
 			AC_MSG_CHECKING([for jar])
-			TMPVAR=`find -L "$with_java_home" -name jar -type f 2>/dev/null | head -n 1`
+			TMPVAR=`find -L "$with_java_home" -name jar -type f 2>/dev/null | LC_ALL=C sort | head -n 1`
 			if test "x$TMPVAR" != "x"
 			then
 				JAR="$TMPVAR"