configure.ac: Detect plain `arm' as an ARM CPU identifier.

For some reason I've not discovered yet, my test machinery shows as
`arm-unknown-linux-gnueabi' rather than `armv7l-unknown-linux-gnueabi',
which inhibits building the fancy CPU-specific code.  This hid a build
failure from my test machinery, which is quite annoying.

diff --git a/configure.ac b/configure.ac
index 715a5c2..246a74a 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -59,7 +59,8 @@ AC_DEFUN([catacomb_CPU_FAMILIES],
    $1([i[[3-6]]86,*], [x86], [sysv])
    $1([x86_64,cygwin], [amd64], [win])
    $1([x86_64,*], [amd64], [sysv])
-   $1([armv*,*-gnueabi | armv*,*-gnueabihf], [armel], [gnueabi])])
+   $1([arm,*-gnueabi | arm,*-gnueabihf | dnl
+       armv*,*-gnueabi | armv*,*-gnueabihf], [armel], [gnueabi])])
 
 dnl A utility to clear the `seen' flags, used so as to process each CPU or
 dnl ABI once.