[PATCH] build system: avoid build failure during bisection
Ron Yorston
rmy at pobox.com
Sat Apr 3 07:57:49 UTC 2021
Commit 4bdc914ff (build system: fix compiler warnings) added a
test on the return value of fgets() in split-include.c.
During bisection it's possible to go back to a state where a
configuration value didn't exist. This results in an empty
include file corresponding to the missing feature. If a
subsequent bisection returns to a state where the feature exists
split-include treats the empty file as an error and the build
fails.
Add a call to ferror() to distinguish between fgets() failing
due to an error and due to there being no data to read.
Signed-off-by: Ron Yorston <rmy at pobox.com>
---
scripts/basic/split-include.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/scripts/basic/split-include.c b/scripts/basic/split-include.c
index 791d142a8..a38ac3427 100644
--- a/scripts/basic/split-include.c
+++ b/scripts/basic/split-include.c
@@ -131,7 +131,7 @@ int main(int argc, const char * argv [])
is_same = 0;
if ((fp_target = fopen(ptarget, "r")) != NULL)
{
- if (!fgets(old_line, buffer_size, fp_target))
+ if (!fgets(old_line, buffer_size, fp_target) && ferror(fp_target))
ERROR_EXIT(ptarget);
if (fclose(fp_target) != 0)
ERROR_EXIT(ptarget);
--
2.30.2
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