Simplify generated_lists generation

The `generated_lists` file is generated as a helper for build related
Makefile to include a list of *.m4 files prerequisites. When some of
these *.m4 files change, the configure script is regenerated when
buildconf is run. This can be simplified using dynamic environment
variable passed to the Makefile directly so it avoids another file from
being generated in the project root directory and shipping it with the
PHP release or creating a dedicated gitignore rule.

This is portable across all POSIX compatible makes So this patch
includes GNU Make, and everybody elses' make derivative support.

1 files changed, 4 insertions, 3 deletions

diff --git a/buildconf b/buildconf
index ad9febfef5..2b2f8f696a 100755
--- a/buildconf
+++ b/buildconf
@@ -91,10 +91,11 @@ fi
 
 echo "buildconf: Building configure files"
 
-rm -f generated_lists
+# List of *.m4 prerequisites files for the make configure target.
+M4_FILES=$(echo TSRM/*.m4 Zend/*.m4 ext/*/config*.m4 sapi/*/config*.m4)
 
 if test "$debug" = "1"; then
-  $MAKE -s -f build/build.mk SUPPRESS_WARNINGS=""
+  $MAKE -s -f build/build.mk M4_FILES="$M4_FILES" SUPPRESS_WARNINGS=""
 else
-  $MAKE -s -f build/build.mk
+  $MAKE -s -f build/build.mk M4_FILES="$M4_FILES"
 fi