[PATCH] arm: do not abort EABI check for bootstrapping

[Mike Frysinger <vapier at gentoo dot org>]

The change to simplify the EABI/OABI check from a tuple to a compile test
broke the ability to bootstrap a cross-compiler when generating the glibc
headers.  At that point, there is no compiler yet, so this compile-time
test will always fail.  Wrap the error with a basic sanity check so that
if the compiler fails, we assume this setup.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---
Note: an alternative might be to just delete the EABI check altogether.
It's not like an OABI compiler will be able to properly build glibc ...

 sysdeps/arm/preconfigure    | 4 ++++
 sysdeps/arm/preconfigure.ac | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/sysdeps/arm/preconfigure b/sysdeps/arm/preconfigure
index 59d776d..6a4c84e 100644
--- a/sysdeps/arm/preconfigure
+++ b/sysdeps/arm/preconfigure
@@ -7,9 +7,13 @@ arm*)
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
+/* Do not abort when bootstrapping initial glibc headers -- determine that with
+   a basic sanity check.  */
+#ifdef __arm__
 #if !__ARM_EABI__
 #error
 #endif
+#endif
 int
 main ()
 {
diff --git a/sysdeps/arm/preconfigure.ac b/sysdeps/arm/preconfigure.ac
index d78817b..157e822 100644
--- a/sysdeps/arm/preconfigure.ac
+++ b/sysdeps/arm/preconfigure.ac
@@ -4,8 +4,12 @@ GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
 case "$machine" in
 arm*)
   AC_TRY_COMPILE([
+/* Do not abort when bootstrapping initial glibc headers -- determine that with
+   a basic sanity check.  */
+#ifdef __arm__
 #if !__ARM_EABI__
 #error
+#endif
 #endif], [], [], [AC_MSG_ERROR([Old ABI no longer supported])])
 
   # If the compiler enables unwind tables by default, this causes
-- 
2.1.3