[Qemu-devel] [PATCH, RFC] Integrate OpenBIOS to QEMU build

[Blue Swirl]

I'm trying to integrate OpenBIOS to general rom building framework in
QEMU but I have some problems with 'make'.

For some reason, build succeeds if run 'make' in
'obj-amd64/pc-bios/openbios' but fails in top level 'obj-amd64'. Maybe
some QEMU makefile variables leak to OpenBIOS make? Using a shell in
the middle didn't help.
  GEN   config-target.h
(sh -c "make -C build build-verbose")
Building...
  GEN   openbios/target/include/openbios-version.h
  GEN   openbios/forth/version.fs
 HOSTCC openbios/host/kernel/dict.o
/src/qemu/roms/openbios/kernel/dict.c:320: fatal error: opening
dependency file /.d: Read-only file system
compilation terminated.
make[3]: *** [host/kernel/dict.o] Error 1
make[2]: *** [build-verbose] Error 1
make[1]: *** [all] Error 2
make: *** [romsubdir-openbios] Error 2
make: Leaving directory `/src/qemu/obj-amd64'

The problem is with -MF $(*D)/$(*F).d which expands to /.d. How is that?

A patch is needed for OpenBIOS for complete out-of-tree build support
(sent to openbios list).

This is what I have for QEMU at the moment (no probing, error
handling, installing etc):
diff --git a/.gitmodules b/.gitmodules
index 7884471..c3faa38 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -10,3 +10,6 @@
 [submodule "roms/ipxe"]
        path = roms/ipxe
        url = git://git.qemu.org/ipxe.git
+[submodule "roms/openbios"]
+       path = roms/openbios
+       url = git://git.qemu.org/openbios.git
diff --git a/configure b/configure
index 1340c33..c408ffa 100755
--- a/configure
+++ b/configure
@@ -2646,6 +2646,7 @@ fi
 if test "$cpu" = "ppc64" -a "$targetos" != "Darwin" ; then
   roms="$roms spapr-rtas"
 fi
+roms="$roms openbios"

 echo "Install prefix    $prefix"
 echo "BIOS directory    `eval echo $datadir`"
@@ -3595,7 +3596,7 @@ echo "QEMU_INCLUDES+=$includes" >> $config_target_mak
 done # for target in $targets

 # build tree in object directory in case the source is not in the
current directory
-DIRS="tests tests/cris slirp audio block net pc-bios/optionrom"
+DIRS="tests tests/cris slirp audio block net pc-bios/optionrom
pc-bios/openbios"
 DIRS="$DIRS pc-bios/spapr-rtas"
 DIRS="$DIRS roms/seabios roms/vgabios"
 DIRS="$DIRS fsdev ui"
@@ -3605,6 +3606,7 @@ FILES="Makefile tests/Makefile"
 FILES="$FILES tests/cris/Makefile tests/cris/.gdbinit"
 FILES="$FILES pc-bios/optionrom/Makefile pc-bios/keymaps"
 FILES="$FILES pc-bios/spapr-rtas/Makefile"
+FILES="$FILES pc-bios/openbios/Makefile"
 FILES="$FILES roms/seabios/Makefile roms/vgabios/Makefile"
 for bios_file in $source_path/pc-bios/*.bin
$source_path/pc-bios/*.rom $source_path/pc-bios/*.dtb
$source_path/pc-bios/openbios-*; do
     FILES="$FILES pc-bios/`basename $bios_file`"
@@ -3629,6 +3631,9 @@ for rom in seabios vgabios ; do
     echo "LD=$ld" >> $config_mak
 done

+echo configuring OpenBIOS
+(cd pc-bios/openbios/build &&
$source_path/roms/openbios/config/scripts/switch-arch sparc32 sparc64
ppc)
+
 for hwlib in 32 64; do
   d=libhw$hwlib
   mkdir -p $d
diff --git a/pc-bios/openbios/Makefile b/pc-bios/openbios/Makefile
new file mode 100644
index 0000000..f019de5
--- /dev/null
+++ b/pc-bios/openbios/Makefile
@@ -0,0 +1,5 @@
+all:
+       (sh -c "make -C build build-verbose")
+
+clean:
+       make -C build $@
diff --git a/roms/openbios b/roms/openbios
new file mode 160000
index 0000000..ff61d97
--- /dev/null
+++ b/roms/openbios
@@ -0,0 +1 @@
+Subproject commit ff61d973e5a4a68b29e485b3f88e6a2d1d96cf45-dirty