[PATCH 4/5] rpdfs-progs: use per-invocation temp file for sparse defines

scripts/sparse.sh wrote .sparse.gcc-defines.h on every invocation.
Under make -j, parallel sparse runs clobbered each other's file
mid-read.  Use mktemp with a trap-based cleanup.

Signed-off-by: Auke Kok <[email protected]>
---
 scripts/sparse.sh | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/scripts/sparse.sh b/scripts/sparse.sh
index 16d11ac..a11b30e 100755
--- a/scripts/sparse.sh
+++ b/scripts/sparse.sh
@@ -48,7 +48,8 @@ search=$(gcc -print-search-dirs | awk '($1 == "install:"){print "-I" $2}')
 # use internal compiler macros to test features.  We copy gcc's and give
 # them to sparse.  But not __SIZE_TYPE__ 'cause sparse defines that one.
 #
-defines=".sparse.gcc-defines.h"
+defines=$(mktemp .sparse.gcc-defines.XXXXXX.h)
+trap "rm -f $defines" EXIT
 gcc -dM -E -x c - < /dev/null | grep -v __SIZE_TYPE__ > $defines
 include="-include $defines"
 
@@ -78,7 +79,7 @@ echo "#define __PRETTY_FUNCTION__ __FILE__ " >> $defines
 . <(awk '
 	($2 == "__STDC_VERSION__") {
 		print $2 "=" substr($3, 1, length($3) - 1)
-}' < .sparse.gcc-defines.h )
+}' < $defines )
 if [ $__STDC_VERSION__ -gt 201710 ]; then
 	cat >> $defines <<EOF
 	// stdbool.h
-- 
2.54.0