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x86: Revise CFLAGS and LDFLAGS for LLVM Clang compatibility

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This patch slightly revises CFLAGS and LDFLAGS to specify the
optimization and debugging options and linker script in a way that is
compatible with using Clang as the C compiler and to invoke the linker
(i.e. CC = clang and LD = clang).
This commit is contained in:
Michael LeMay 2015-07-29 07:28:13 -07:00 committed by Jesus Sanchez-Palencia
parent 128d9f3566
commit 0dcd5e9b5a
3 changed files with 15 additions and 6 deletions
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6
cpu/x86/Makefile.x86_common
View file

@ -16,5 +16,9 @@ ifeq ($(BUILD_RELEASE),1)
CFLAGS += -Os -fno-strict-aliasing
LDFLAGS += -Wl,--strip-all
else
CFLAGS += -Og -ggdb3
ifeq ($(findstring clang,$(CC)),clang)
CFLAGS += -O0 -g
else
CFLAGS += -Og -ggdb3
endif
endif

2
cpu/x86/Makefile.x86_quarkX1000
View file

@ -5,5 +5,5 @@ CONTIKI_CPU_DIRS += drivers/legacy_pc drivers/quarkX1000 init/legacy_pc
CONTIKI_SOURCEFILES += bootstrap_quarkX1000.S rtc.c pit.c pic.c irq.c nmi.c pci.c uart-16x50.c uart.c
CFLAGS += -m32 -march=i586 -mtune=i586
LDFLAGS += -m32 -T $(CONTIKI)/cpu/x86/quarkX1000.ld
LDFLAGS += -m32 -Xlinker -T -Xlinker $(CONTIKI)/cpu/x86/quarkX1000.ld
ASFLAGS += --32 -march=i586 -mtune=i586

13
platform/galileo/README.md
View file

@ -48,9 +48,14 @@ command:
$ ./platform/galileo/bsp/libc/build_newlib.sh
```
Once newlib is built, you are ready to build applications. To build
applications for Galileo platform you should set TARGET variable to 'galileo'.
For instance, building the hello-world application should look like this:
Once newlib is built, you are ready to build applications. By default, the
following steps will use gcc as the C compiler and to invoke the linker. To
use LLVM clang instead, change the values for both the CC and LD variables in
cpu/x86/Makefile.x86_common to 'clang'.
To build applications for the Galileo platform you should set the TARGET
variable to 'galileo'. For instance, building the hello-world application
should look like this:
```
$ cd examples/hello-world/ && make TARGET=galileo
```
@ -125,7 +130,7 @@ $ multiboot /hello-world.galileo
$ boot
```
This should boot the Contiki image, resulted in the following messages being
This should boot the Contiki image, resulting in the following messages being
sent to the serial console:
```
Starting Contiki