configure: Allow the configure script to fail with a non-zero exit code

For poorly configured environments, configure may fail but will still
exit with code 0. This, in turn, causes cryptic build errors later.

Fix this by adding "set -e". Also, append "|| true" to prevent the
`expr` command breaks because it will return a non-zero exit code if
the regex doesn't match.

Closes: https://github.com/axboe/liburing/pull/553
Co-authored-by: Roman Gershman <romange@gmail.com>
Signed-off-by: Roman Gershman <romange@gmail.com>
Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/configure b/configure
index 512a556..f2bf041 100755
--- a/configure
+++ b/configure
@@ -1,10 +1,12 @@
 #!/bin/sh
 
+set -e
+
 cc=${CC:-gcc}
 cxx=${CXX:-g++}
 
 for opt do
-  optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
+  optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)' || true)
   case "$opt" in
   --help|-h) show_help=yes
   ;;