re PR bootstrap/13334 (Bootstrap failure: libiberty/fibheap.c: LONG_MIN undeclared)

2004-06-26  Andrew Pinski  <pinskia@physics.uc.edu>

        PR 13334
        * doc/install.texi: Document non-standard CFLAGS and bootstrap
        failures and warnings.

From-SVN: r83718

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 21586cea53757dfe27de588668c62bbbf8ceca87..b37f066fd5f90be342759c36330400f4fb82f151 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2004-06-26  Andrew Pinski  <pinskia@physics.uc.edu>
+
+       PR 13334
+       * doc/install.texi: Document non-standard CFLAGS and bootstrap
+       failures and warnings.
+
 2004-06-26  Andrew Haley  <aph@redhat.com>
 
        * emit-rtl.c (set_mem_attributes_minus_bitpos): Check

diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index 99d1fb14bf678be54a6a04c6b40561519ec72b99..3badfa407193491f7b2388b5ff82fcbf20ec3276 100644 (file)
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -1477,6 +1477,12 @@ around this, by choosing @code{BOOT_CFLAGS} to avoid the parts of the
 stage1 compiler that were miscompiled, or by using @samp{make
 bootstrap4} to increase the number of stages of bootstrap.
 
+Note that using non-standard @code{CFLAGS} can cause bootstrap to fail in
+@file{libiberty}, if these trigger a warning with the new compiler.  For
+example using @samp{-O2 -g -mcpu=i686} on @code{i686-pc-linux-gnu} will
+cause bootstrap failure as @code{-mcpu=} is deprecated in 3.4.0 and above.
+
+
 If you used the flag @option{--enable-languages=@dots{}} to restrict
 the compilers to be built, only those you've actually enabled will be
 built.  This will of course only build those runtime libraries, for