[Bug target/52610] mpfr fails to compile when specifying CFLAGS="-O3 -mcpu=leon"

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52610

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ebotcazou at gcc dot
                   |                            |gnu.org

--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-03-18 08:13:53 UTC ---
> error when compiling MPFR 3.1.0:
> debian-sparc:~/src/mpfr-3.1.0# CFLAGS="-O3 -mcpu=leon -flto" CXXFLAGS="-O3
> -mcpu=v8 -flto" LDFLAGS="-flto -O3 -mcpu=v8"  ./configure
> --prefix=/opt/gcc-4.7.0 --with-gnu-as --with-gnu-ld --with-gmp=/opt/gcc-4.7.0

You have a strange mix of options -mcpu=leon/-mcpu=v8 here.

> When I try to add -Av8 to CFLAGS, I get this error:
> <command-line>:0:1: error: missing '(' after predicate

Sure, -Av8 is an assembler option, not a compiler option.

> I have a qemu-sparc virtual machine based on Debian/Sarge I can provide that
> reproduces the problem. I'll work on attaching a pre-processed example.

Try this:

Index: config/sparc/sparc.h
===================================================================
--- config/sparc/sparc.h        (revision 185503)
+++ config/sparc/sparc.h        (working copy)
@@ -328,6 +328,7 @@ extern enum cmodel sparc_cmodel;
 %{mcpu=sparclite:-Asparclite} \
 %{mcpu=sparclite86x:-Asparclite} \
 %{mcpu=f930:-Asparclite} %{mcpu=f934:-Asparclite} \
+%{mcpu=leon:-Av8} \
 %{mcpu=v8:-Av8} \
 %{mv8plus:-Av8plus} \
 %{mcpu=v9:-Av9} \