Add meson build

That should provide same build results as the Makefile.

tags targets are pending review for meson:
https://github.com/mesonbuild/meson/pull/6058

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>

3 files changed, 54 insertions, 57 deletions

diff --git a/Makefile b/Makefile
deleted file mode 100644
index b5970a8..0000000
--- a/Makefile
+++ /dev/null
@@ -1,57 +0,0 @@
-obj-y = code16.o entry.o main.o string.o printf.o cstart.o fw_cfg.o
-obj-y += linuxboot.o malloc.o tables.o hwsetup.o pci.o code32seg.o
-obj-y += mptable.o smbios.o
-
-all-y = bios.bin
-all: $(all-y)
-
-CFLAGS := -O2 -g
-
-BIOS_CFLAGS += $(autodepend-flags) -Wall
-BIOS_CFLAGS += -m32
-BIOS_CFLAGS += -march=i386
-BIOS_CFLAGS += -mregparm=3
-BIOS_CFLAGS += -fno-stack-protector -fno-delete-null-pointer-checks
-BIOS_CFLAGS += -ffreestanding
-BIOS_CFLAGS += -mstringop-strategy=rep_byte -minline-all-stringops
-BIOS_CFLAGS += -Iinclude
-BIOS_CFLAGS += -fno-pic
-
-code32seg.o-cflags = -fno-jump-tables
-
-dummy := $(shell mkdir -p .deps)
-autodepend-flags = -MMD -MF .deps/cc-$(patsubst %/,%,$(dir $*))-$(notdir $*).d
--include .deps/*.d
-
-.PRECIOUS: %.o
-%.o: %.c
-	$(CC) $(CFLAGS) $(BIOS_CFLAGS) $($@-cflags) -c -s $< -o $@
-%.o: %.S
-	$(CC) $(CFLAGS) $(BIOS_CFLAGS) -c -s $< -o $@
-
-bios.bin.elf: $(obj-y) flat.lds
-	$(LD) -T flat.lds -o bios.bin.elf $(obj-y)
-
-bios.bin: bios.bin.elf
-	objcopy -O binary bios.bin.elf bios.bin
-
-clean:
-	rm -f $(obj-y) $(all-y) bios.bin.elf
-	rm -f cscope.* tags TAGS
-	rm -rf .deps
-
-.PHONY: cscope
-cscope:
-	rm -f cscope.*
-	find . -name "*.[chsS]" -print | sed 's,^\./,,' > cscope.files
-	cscope -b -i cscope.files
-
-.PHONY: ctags
-ctags:
-	rm -f tags
-	find . -name "*.[ch]" -exec ctags --append {} +
-
-.PHONY: TAGS
-TAGS:
-	rm -f TAGS
-	find . -name "*.[ch]" -exec etags --append {} +
diff --git a/code32seg.c b/code32seg.c
index 213bf44..e829c03 100644
--- a/code32seg.c
+++ b/code32seg.c
@@ -21,6 +21,8 @@ static inline void *from_flat_ptr(void *p)
 
 #define FLAT_VAR(x)  (*(typeof(&(x))) from_flat_ptr(&(x)))
 
+#pragma GCC optimize("no-jump-tables")
+
 bioscall void pcibios_handler(struct bios32regs *args)
 {
 	switch (args->eax) {
diff --git a/meson.build b/meson.build
new file mode 100644
index 0000000..ce291a3
--- /dev/null
+++ b/meson.build
@@ -0,0 +1,52 @@
+project('qboot', 'c')
+
+cc = meson.get_compiler('c')
+objcopy = find_program('objcopy')
+
+c_args = [
+  '-m32',
+  '-march=i386',
+  '-mregparm=3',
+  '-fno-stack-protector',
+  '-fno-delete-null-pointer-checks',
+  '-ffreestanding',
+  '-mstringop-strategy=rep_byte',
+  '-minline-all-stringops',
+  '-fno-pic',
+]
+
+link_args = ['-nostdlib', '-m32']
+link_args += cc.get_supported_link_arguments('-Wl,--build-id=none')
+link_args += '-Wl,-T' + meson.current_source_dir() / 'flat.lds'
+
+elf = executable(
+  'bios.bin.elf',
+  files(
+    'code16.c',
+    'code32seg.c',
+    'cstart.S',
+    'entry.S',
+    'fw_cfg.c',
+    'hwsetup.c',
+    'linuxboot.c',
+    'main.c',
+    'malloc.c',
+    'mptable.c',
+    'pci.c',
+    'printf.c',
+    'string.c',
+    'smbios.c',
+    'tables.c',
+  ),
+  c_args: c_args,
+  include_directories: include_directories('include'),
+  link_args: link_args,
+)
+
+bin = custom_target(
+  'bios.bin',
+  output: 'bios.bin',
+  input: elf,
+  command: [objcopy, '-O', 'binary', '@INPUT@', '@OUTPUT@'],
+  build_by_default: true,
+)