Initial revision

diff --git a/configure.in b/configure.in
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+dnl Process this file with autoconf to produce a configure script.
+AC_INIT(regex.c)
+
+AC_PROG_CC
+AC_PROG_INSTALL
+
+dnl I'm not sure if AC_AIX and AC_DYNIX_SEQ are really necessary.  The
+dnl Autoconf documentation isn't specific about which BSD functions they
+dnl provide.
+AC_AIX
+AC_DYNIX_SEQ
+AC_ISC_POSIX
+AC_MINIX
+
+AC_STDC_HEADERS
+AC_USG
+
+AC_ALLOCA
+dnl We would like to use AC_CONST, but then the test on __STDC__ fails,
+dnl and any package which does *not* use AC_CONST loses.
+
+AC_PREFIX(gcc)
+
+AC_OUTPUT(Makefile doc/Makefile test/Makefile)