commit b69f95d6562b6a57c9be36da0cdf2a500adb94e9
author Yousong Zhou <yszhou4tech@gmail.com> Thu Apr 26 19:27:54 2018 +0800
committer Yousong Zhou <yszhou4tech@gmail.com> Fri Apr 27 09:39:19 2018 +0800
tree a9d5e47eb00a34e97687945ec2c3a98cc6221ad2
parent 8e250c390a45f722387c1881ae5f99849a2d1e22

build: fix subst toolexecdir, toolexeclibdir

On CentOS 7.4, configure script generated by autogen.sh will output the
following values when compiling GCC source code

    toolexecdir='NONE/$(target_alias)'
    toolexeclibdir='NONE/$(target_alias)/lib'

and cause build error

    ... -o libffi.la -rpath NONE/riscv64-bs-linux-gnu/lib ...
    checking for shl_load in -ldld... libtool: link: only absolute run-paths are allowed

configure.ac

diff --git a/configure.ac b/configure.ac
index 44a31ce..aec2f55 100644
--- a/configure.ac
+++ b/configure.ac
@@ -353,11 +353,11 @@
 if test "x$GCC" = "xyes"; then
   if test -n "$with_cross_host" &&
      test x"$with_cross_host" != x"no"; then
-    toolexecdir="${exec_prefix}"/'$(target_alias)'
-    toolexeclibdir="${toolexecdir}"/lib
+    toolexecdir='${exec_prefix}'/'$(target_alias)'
+    toolexeclibdir='${toolexecdir}'/lib
   else
-    toolexecdir="${libdir}"/gcc-lib/'$(target_alias)'
-    toolexeclibdir="${libdir}"
+    toolexecdir='${libdir}'/gcc-lib/'$(target_alias)'
+    toolexeclibdir='${libdir}'
   fi
   if test x"$enable_multi_os_directory" != x"no"; then
     multi_os_directory=`$CC $CFLAGS -print-multi-os-directory`
@@ -368,7 +368,7 @@
   fi
   AC_SUBST(toolexecdir)
 else
-  toolexeclibdir="${libdir}"
+  toolexeclibdir='${libdir}'
 fi
 AC_SUBST(toolexeclibdir)