diff options
Diffstat (limited to 'recipes-extended/dev86/dev86/0001-cpp-fix-race-writing-token.h-files.patch')
| -rw-r--r-- | recipes-extended/dev86/dev86/0001-cpp-fix-race-writing-token.h-files.patch | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/recipes-extended/dev86/dev86/0001-cpp-fix-race-writing-token.h-files.patch b/recipes-extended/dev86/dev86/0001-cpp-fix-race-writing-token.h-files.patch new file mode 100644 index 00000000..d6e79999 --- /dev/null +++ b/recipes-extended/dev86/dev86/0001-cpp-fix-race-writing-token.h-files.patch @@ -0,0 +1,42 @@ +Upstream-Status: Submitted [https://github.com/jbruchon/dev86/pull/23] +Signed-off-by: Ross Burton <ross.burton@arm.com> + +From f507ee398ae20e4e97f01dfbd9a8709a90bc760f Mon Sep 17 00:00:00 2001 +From: Ross Burton <ross.burton@arm.com> +Date: Fri, 29 Apr 2022 16:44:08 +0100 +Subject: [PATCH] cpp: fix race writing token.h files + +The rules for token1.h and token2.h both write to a temporary file tmp.h +before renaming to token1.h or token2.h. However, in a parallel build +these will execute at the same time and race. + + gperf -aptTc -N is_ctok -H hash1 token1.tok > tmp.h + gperf -aptTc -k1,3 -N is_ckey -H hash2 token2.tok > tmp.h + mv tmp.h token1.h + mv tmp.h token2.h + mv: cannot stat 'tmp.h': No such file or directory + +By using gperf --output-file, the race is avoided entirely. +--- + cpp/Makefile | 6 ++---- + 1 file changed, 2 insertions(+), 4 deletions(-) + +diff --git a/cpp/Makefile b/cpp/Makefile +index 0ea43cc..743694f 100644 +--- a/cpp/Makefile ++++ b/cpp/Makefile +@@ -20,9 +20,7 @@ token1.o: token1.h + token2.o: token2.h + + token1.h: token1.tok +- gperf -aptTc -N is_ctok -H hash1 token1.tok > tmp.h +- mv tmp.h token1.h ++ gperf -aptTc -N is_ctok -H hash1 --output-file $@ $< + + token2.h: token2.tok +- gperf -aptTc -k1,3 -N is_ckey -H hash2 token2.tok > tmp.h +- mv tmp.h token2.h ++ gperf -aptTc -k1,3 -N is_ckey -H hash2 --output-file $@ $< +-- +2.25.1 + |