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FreeDOS/mkfiles/gcc.mak

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Makefile
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C source code changes so the kernel can compile with ia16-elf-gcc. Use "make all COMPILER=gcc". Linking does not work yet with these changes.
2017-12-19 13:29:43 +01:00
#
# GCC.MAK - kernel compiler options for ia16-elf-gcc
#
CC=ia16-elf-gcc -c
ia16-elf-gcc: provide GNU LD linker script and symbols to link kernel. The resulting kernel and sys.com do not work yet (kernel prints 123 only). Some functions in sys.com are placeholders.
2017-12-19 16:40:39 +01:00
CL=ia16-elf-gcc
C source code changes so the kernel can compile with ia16-elf-gcc. Use "make all COMPILER=gcc". Linking does not work yet with these changes.
2017-12-19 13:29:43 +01:00
INCLUDEPATH=.
!if $(XCPU) != 186
!if $(XCPU) != 386
TARGETOPT=-march=i8086
!endif
!endif
Use "ar" instead of "wlib" in gcc build.
2017-12-21 18:40:34 +01:00
LIBUTIL=ar crs
C source code changes so the kernel can compile with ia16-elf-gcc. Use "make all COMPILER=gcc". Linking does not work yet with these changes.
2017-12-19 13:29:43 +01:00
LIBPLUS=
LIBTERM=
TINY=-mcmodel=tiny
sys.com compiled with ia16-elf-gcc: fill in missing functions.
2017-12-21 18:35:47 +01:00
CFLAGST=-Os -fpack-struct -fcall-used-es -w -o $@
C source code changes so the kernel can compile with ia16-elf-gcc. Use "make all COMPILER=gcc". Linking does not work yet with these changes.
2017-12-19 13:29:43 +01:00
CFLAGSC=
TARGET=KGC
#
# heavy stuff - building
#
# -mcmodel=small small memory model (small code/small data)
ia16-elf-gcc: provide GNU LD linker script and symbols to link kernel. The resulting kernel and sys.com do not work yet (kernel prints 123 only). Some functions in sys.com are placeholders.
2017-12-19 16:40:39 +01:00
# -Os -> favor code size over execution time in optimizations
C source code changes so the kernel can compile with ia16-elf-gcc. Use "make all COMPILER=gcc". Linking does not work yet with these changes.
2017-12-19 13:29:43 +01:00
# -fleading-underscore underscores leading field for DOS compiler compat
# -fno-common no "common" variables, just BSS for uninitialized data
# -fpack-struct pack structure members
# -ffreestanding don't assume any headers
# -fcall-used-es es clobbered in function calls
# -mrtd use stdcall calling convention
# -w disable warnings for now
# -Werror treat all warnings as errors
ia16-elf-gcc: provide GNU LD linker script and symbols to link kernel. The resulting kernel and sys.com do not work yet (kernel prints 123 only). Some functions in sys.com are placeholders.
2017-12-19 16:40:39 +01:00
ALLCFLAGS=-I../hdr $(TARGETOPT) $(ALLCFLAGS) -mcmodel=small -fleading-underscore -fno-common -fpack-struct -ffreestanding -fcall-used-es -mrtd -w -Werror -Os
C source code changes so the kernel can compile with ia16-elf-gcc. Use "make all COMPILER=gcc". Linking does not work yet with these changes.
2017-12-19 13:29:43 +01:00
INITCFLAGS=$(ALLCFLAGS) -o $@
CFLAGS=$(ALLCFLAGS) -o $@
ia16-elf-gcc port: compile all asm files with -f elf. Because ia16-elf-gcc and the GNU linker do not understand OMF we need to use ELF everywhere. This also means we cannot use "wrt", "seg" and "call/jmp far". Most wrt's are superfluous, and seg and call/jmp far can be replaced by explicit ?GROUP references (to be defined in the linker script).
2017-12-19 14:22:58 +01:00
NASMFLAGS=$(NASMFLAGS) -f elf -o $@
C source code changes so the kernel can compile with ia16-elf-gcc. Use "make all COMPILER=gcc". Linking does not work yet with these changes.
2017-12-19 13:29:43 +01:00
DIRSEP=/
RM=rm -f
ia16-elf-gcc: provide GNU LD linker script and symbols to link kernel. The resulting kernel and sys.com do not work yet (kernel prints 123 only). Some functions in sys.com are placeholders.
2017-12-19 16:40:39 +01:00
CP=cp
C source code changes so the kernel can compile with ia16-elf-gcc. Use "make all COMPILER=gcc". Linking does not work yet with these changes.
2017-12-19 13:29:43 +01:00
ECHOTO=echo>>
Create init varieties for unsigned long helper functions. An INITPATCH is used to make sure the correct symbols are used. The GCC kernel now shows the copyright string and boots a little further.
2017-12-19 19:46:49 +01:00
INITPATCH=objcopy --redefine-sym ___umodsi3=_init_umodsi3 --redefine-sym ___udivsi3=_init_udivsi3 --redefine-sym ___ashlsi3=_init_ashlsi3 --redefine-sym ___lshrsi3=_init_lshrsi3
C source code changes so the kernel can compile with ia16-elf-gcc. Use "make all COMPILER=gcc". Linking does not work yet with these changes.
2017-12-19 13:29:43 +01:00
CLDEF=1
CLT=gcc -DDOSC_TIME_H -I../hdr -o $@
CLC=$(CLT)
ia16-elf-gcc: provide GNU LD linker script and symbols to link kernel. The resulting kernel and sys.com do not work yet (kernel prints 123 only). Some functions in sys.com are placeholders.
2017-12-19 16:40:39 +01:00
XLINK=$(CL) -Tkernel.ld -Wl,-Map,kernel.map -o kernel.exe $(OBJS) -Wl,--whole-archive ../drivers/device.lib -Wl,--no-whole-archive $#
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