1 ## -*- makefile -*- ------------------------------------------------------- 2 ## 3 ## Copyright 2008 H. Peter Anvin - All Rights Reserved 4 ## 5 ## This program is free software; you can redistribute it and/or modify 6 ## it under the terms of the GNU General Public License as published by 7 ## the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 8 ## Boston MA 02110-1301, USA; either version 2 of the License, or 9 ## (at your option) any later version; incorporated herein by reference. 10 ## 11 ## ----------------------------------------------------------------------- 12 13 ## 14 ## ELF common configurables 15 ## 16 17 include $(MAKEDIR)/syslinux.mk 18 19 # Support IA32 and x86_64 platforms with one build 20 # Set up architecture specifics; for cross compilation, set ARCH as apt 21 GCCOPT := $(call gcc_ok,-std=gnu99,) 22 ifeq ($(ARCH),i386) 23 GCCOPT += $(call gcc_ok,-m32,) 24 GCCOPT += $(call gcc_ok,-march=i386) 25 GCCOPT += $(call gcc_ok,-mpreferred-stack-boundary=2,) 26 endif 27 ifeq ($(ARCH),x86_64) 28 GCCOPT += $(call gcc_ok,-m64,) 29 GCCOPT += $(call gcc_ok,-march=x86-64) 30 #let preferred-stack-boundary be default (=4) 31 endif 32 GCCOPT += -Os -fomit-frame-pointer 33 GCCOPT += $(call gcc_ok,-fno-stack-protector,) 34 GCCOPT += $(call gcc_ok,-fwrapv,) 35 GCCOPT += $(call gcc_ok,-freg-struct-return,) 36 GCCOPT += $(call gcc_ok,-fno-exceptions,) 37 GCCOPT += $(call gcc_ok,-fno-asynchronous-unwind-tables,) 38 # Note -fPIE does not work with ld on x86_64, try -fPIC instead 39 # Does BIOS build depend on -fPIE? 40 GCCOPT += $(call gcc_ok,-fPIC) 41 GCCOPT += $(call gcc_ok,-falign-functions=0,-malign-functions=0) 42 GCCOPT += $(call gcc_ok,-falign-jumps=0,-malign-jumps=0) 43 GCCOPT += $(call gcc_ok,-falign-labels=0,-malign-labels=0) 44 GCCOPT += $(call gcc_ok,-falign-loops=0,-malign-loops=0) 45 46 com32 = $(topdir)/com32 47 core = $(topdir)/core 48 49 ifneq ($(NOGPL),1) 50 GPLLIB = $(objdir)/com32/gpllib/libgpl.c32 51 GPLINCLUDE = -I$(com32)/gplinclude 52 else 53 GPLLIB = 54 GPLINCLUDE = 55 endif 56 57 CFLAGS = $(GCCOPT) $(GCCWARN) -W -Wall \ 58 -fomit-frame-pointer -D__COM32__ -D__FIRMWARE_$(FIRMWARE)__ -DDYNAMIC_MODULE \ 59 -nostdinc -iwithprefix include \ 60 -I$(com32)/libutil/include -I$(com32)/include \ 61 -I$(com32)/include/sys $(GPLINCLUDE) -I$(core)/include \ 62 -I$(objdir) -DLDLINUX=\"$(LDLINUX)\" 63 ifndef EFI_BUILD 64 CFLAGS += -mregparm=3 -DREGPARM=3 65 endif 66 67 SFLAGS = $(GCCOPT) -D__COM32__ -D__FIRMWARE_$(FIRMWARE)__ 68 LDFLAGS = -m elf_$(ARCH) -shared --hash-style=gnu -T $(com32)/lib/$(ARCH)/elf.ld --as-needed 69 LIBGCC := $(shell $(CC) $(GCCOPT) --print-libgcc) 70 71 LNXCFLAGS = -I$(com32)/libutil/include -W -Wall -O -g -D_GNU_SOURCE 72 LNXSFLAGS = -g 73 LNXLDFLAGS = -g 74 75 C_LIBS += $(objdir)/com32/libutil/libutil.c32 $(GPLLIB) \ 76 $(objdir)/com32/lib/libcom32.c32 77 C_LNXLIBS = $(objdir)/com32/libutil/libutil_lnx.a \ 78 $(objdir)/com32/elflink/ldlinux/ldlinux_lnx.a 79 80 .SUFFIXES: .lss .c .o 81 82 .PRECIOUS: %.o 83 %.o: %.S 84 $(CC) $(SFLAGS) -c -o $@ $< 85 86 .PRECIOUS: %.o 87 %.o: %.c 88 $(CC) $(CFLAGS) -c -o $@ $< 89 90 .PRECIOUS: %.lo 91 %.lo: %.S 92 $(CC) $(LNXSFLAGS) -c -o $@ $< 93 94 .PRECIOUS: %.lo 95 %.lo: %.c 96 $(CC) $(LNXCFLAGS) -c -o $@ $< 97 98 .PRECIOUS: %.lnx 99 %.lnx: %.lo $(LNXLIBS) $(C_LNXLIBS) 100 $(CC) $(LNXCFLAGS) -o $@ $^ 101 102 .PRECIOUS: %.elf 103 %.elf: %.o $(C_LIBS) 104 $(LD) $(LDFLAGS) -o $@ $^ 105 106 %.c32: %.elf 107 $(OBJCOPY) --strip-debug --strip-unneeded $< $@ 108
