build: fix bashisms in configure #1595
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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> (cherry picked from commit c623f47)
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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
(cherry picked from commit c623f47)