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| author | Rainer Orth <ro@TechFak.Uni-Bielefeld.DE> | 2002-05-17 19:04:36 +0000 |
|---|---|---|
| committer | Rainer Orth <ro@gcc.gnu.org> | 2002-05-17 19:04:36 +0000 |
| commit | 0fca60abae8a470b8fa0be07ed10dc44fc2f039d (patch) | |
| tree | 0a807bc667125fdbc126042176d08a361395034f | |
| parent | dd3f0101652432c1da354268600ccde52d834256 (diff) | |
| download | gcc-0fca60abae8a470b8fa0be07ed10dc44fc2f039d.zip gcc-0fca60abae8a470b8fa0be07ed10dc44fc2f039d.tar.gz gcc-0fca60abae8a470b8fa0be07ed10dc44fc2f039d.tar.bz2 | |
install.texi (Specific, [...]): Document need to bootstrap with -mips3.
* doc/install.texi (Specific, mips-sgi-irix6): Document need to
bootstrap with -mips3.
From-SVN: r53564
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/doc/install.texi | 21 |
2 files changed, 26 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 13d7937..db21a4c5 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2002-05-17 Rainer Orth <ro@TechFak.Uni-Bielefeld.DE> + + * doc/install.texi (Specific, mips-sgi-irix6): Document need to + bootstrap with -mips3. + 2002-05-17 Kazu Hirata <kazu@cs.umass.edu> * final.c: Fix formatting. diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi index d3b8aea..9dfbd9f 100644 --- a/gcc/doc/install.texi +++ b/gcc/doc/install.texi @@ -3187,6 +3187,27 @@ then your version of @command{cc} uses the O32 or N64 ABI by default. You should set the environment variable @env{CC} to @samp{cc -n32} before configuring GCC@. +If you want the resulting @command{gcc} to run on old 32-bit systems +with the MIPS R4400 CPU, you need to ensure that only code for the mips3 +instruction set architecture (ISA) is generated. While GCC 3.x does +this correctly, both GCC 2.95 and SGI's MIPSpro @command{cc} may change +the ISA depending on the machine where GCC is built. Using one of them +as the bootstrap compiler may result in mips4 code, which won't run at +all on mips3-only systems. For the test program above, you should see: + +@example +test.o: ELF N32 MSB mips-3 @dots{} +@end example + +If you get: + +@example +test.o: ELF N32 MSB mips-4 @dots{} +@end example + +instead, you should set the environment variable @env{CC} to @samp{cc +-n32 -mips3} or @samp{gcc -mips3} respectively before configuring GCC@. + GCC on IRIX 6 is usually built to support both the N32 and N64 ABIs. If you build GCC on a system that doesn't have the N64 libraries installed, you need to configure with @option{--disable-multilib} so GCC doesn't |