configure.ac: fix bashism in dead code removal check (#2117)

configure scripts need to be runnable with a POSIX-compliant /bin/sh.

On many (but not all!) systems, /bin/sh is provided by Bash, so errors
like this aren't spotted. Notably Debian defaults to /bin/sh provided by
dash which doesn't tolerate such bashisms as '=='.

This retains compatibility with bash.

Signed-off-by: Sam James <sam@gentoo.org>

diff --git a/configure.ac b/configure.ac
index 82bdf230f51136cb5d60702098c4b9ff8639bd10..3cf5f50e781f2278716ce23e5e2410bf7ba50a25 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -662,7 +662,7 @@ AC_LINK_IFELSE(
         DEAD_CODE_REMOVAL="";])
 LDFLAGS=$save_LDFLAGS
 
-if test "$DEAD_CODE_REMOVAL" == ""; then
+if test "$DEAD_CODE_REMOVAL" = ""; then
     # Macos linkers have a -dead_strip flag, which is similar to --gc-sections.
     save_LDFLAGS=$LDFLAGS
     LDFLAGS="$LDFLAGS -Wl,-dead_strip"