[PATCH 4/6] configure, pc-bios/vof: pass cross CFLAGS correctly

[Paolo Bonzini <pbonzini@redhat.com>]

Use the flags passed to the configure script for the ppc cross compiler,
which in fact default to those that are needed to get the 32-bit ISA.
Add the endianness flag so that it remains possible to use a ppc64le
compiler to compile VOF.

This also fixes compilation of TCG tests using a biarch compiler,
for example ppc64 tests on ppc64le.

Reported-by: Matheus Ferst <matheus.ferst@eldorado.org.br
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 configure            | 13 ++++---------
 pc-bios/vof/Makefile |  8 +++-----
 2 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/configure b/configure
index bf9282e2a1..8f3401a23e 100755
--- a/configure
+++ b/configure
@@ -1858,7 +1858,7 @@ fi
 : ${cross_cc_hexagon="hexagon-unknown-linux-musl-clang"}
 : ${cross_cc_cflags_hexagon="-mv67 -O2 -static"}
 : ${cross_cc_cflags_i386="-m32"}
-: ${cross_cc_cflags_ppc="-m32"}
+: ${cross_cc_cflags_ppc="-m32 -mbig-endian"}
 : ${cross_cc_cflags_ppc64="-m64 -mbig-endian"}
 : ${cross_cc_ppc64le="$cross_cc_ppc64"}
 : ${cross_cc_cflags_ppc64le="-m64 -mlittle-endian"}
@@ -2059,6 +2059,7 @@ probe_target_compiler() {
   compute_target_variable $1 target_strip strip
   case "$1:$cpu" in
     i386:x86_64 | \
+    ppc*:ppc64 | \
     "$cpu:$cpu")
       : ${target_cc:=$cc}
       : ${target_ccas:=$ccas}
@@ -2084,13 +2085,6 @@ probe_target_compiler() {
   fi
 }
 
-probe_target_compilers() {
-  for i; do
-    probe_target_compiler $i
-    test -n "$target_cc" && return 0
-  done
-}
-
 write_target_makefile() {
   if test -n "$target_cc"; then
     echo "CC=$target_cc"
@@ -2265,12 +2259,13 @@ if test -n "$target_cc" &&
     fi
 fi
 
-probe_target_compilers ppc ppc64
+probe_target_compiler ppc
 if test -n "$target_cc" && test "$softmmu" = yes; then
     roms="$roms pc-bios/vof"
     config_mak=pc-bios/vof/config.mak
     echo "# Automatically generated by configure - do not modify" > $config_mak
     echo "SRC_DIR=$source_path/pc-bios/vof" >> $config_mak
+    echo "EXTRA_CFLAGS=$target_cflags" >> $config_mak
     write_target_makefile >> $config_mak
 fi
 
diff --git a/pc-bios/vof/Makefile b/pc-bios/vof/Makefile
index 391ac0d600..8809c82768 100644
--- a/pc-bios/vof/Makefile
+++ b/pc-bios/vof/Makefile
@@ -2,15 +2,13 @@ include config.mak
 VPATH=$(SRC_DIR)
 all: vof.bin
 
-CC ?= $(CROSS)gcc
-LD ?= $(CROSS)ld
-OBJCOPY ?= $(CROSS)objcopy
+EXTRA_CFLAGS += -mcpu=power4
 
 %.o: %.S
-	$(CC) -m32 -mbig-endian -mcpu=power4 -c -o $@ $<
+	$(CC) $(EXTRA_CFLAGS) -c -o $@ $<
 
 %.o: %.c
-	$(CC) -m32 -mbig-endian -mcpu=power4 -c -fno-stack-protector -o $@ $<
+	$(CC) $(EXTRA_CFLAGS) -c -fno-stack-protector -o $@ $<
 
 vof.elf: entry.o main.o ci.o bootmem.o libc.o
 	$(LD) -nostdlib -e_start -T$(SRC_DIR)/vof.lds -EB -o $@ $^
-- 
2.36.1