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authorSam Ravnborg <sam@ravnborg.org>2009-09-19 04:31:45 -0400
committerSam Ravnborg <sam@ravnborg.org>2009-09-20 06:27:42 -0400
commit691ef3e7fdc1fe4dded169d9404f740987f67d66 (patch)
tree06e8842f0dd8bb015b678a96655e8c2f17baaaa5 /scripts/Kbuild.include
parentf86fd306605287d7c7f4f0f8e8e2a9d49d28b396 (diff)
kbuild: introduce ld-option
ld-option is used to check if $(LD) supports a specific option. Based on patch from Andi Kleen. Cc: Andi Kleen <ak@linux.intel.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> First use is to check if option -X is supported (upcoming patch). Theis is ne
Diffstat (limited to 'scripts/Kbuild.include')
-rw-r--r--scripts/Kbuild.include8
1 files changed, 7 insertions, 1 deletions
diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 94a4f682f385..b3452601b0b1 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -83,11 +83,12 @@ TMPOUT := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/)
83# is automatically cleaned up. 83# is automatically cleaned up.
84try-run = $(shell set -e; \ 84try-run = $(shell set -e; \
85 TMP="$(TMPOUT).$$$$.tmp"; \ 85 TMP="$(TMPOUT).$$$$.tmp"; \
86 TMPO="$(TMPOUT).$$$$.o"; \
86 if ($(1)) >/dev/null 2>&1; \ 87 if ($(1)) >/dev/null 2>&1; \
87 then echo "$(2)"; \ 88 then echo "$(2)"; \
88 else echo "$(3)"; \ 89 else echo "$(3)"; \
89 fi; \ 90 fi; \
90 rm -f "$$TMP") 91 rm -f "$$TMP" "$$TMPO")
91 92
92# as-option 93# as-option
93# Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,) 94# Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,)
@@ -135,6 +136,11 @@ cc-ifversion = $(shell [ $(call cc-version, $(CC)) $(1) $(2) ] && echo $(3))
135cc-ldoption = $(call try-run,\ 136cc-ldoption = $(call try-run,\
136 $(CC) $(1) -nostdlib -xc /dev/null -o "$$TMP",$(1),$(2)) 137 $(CC) $(1) -nostdlib -xc /dev/null -o "$$TMP",$(1),$(2))
137 138
139# ld-option
140# Usage: LDFLAGS += $(call ld-option, -X)
141ld-option = $(call try-run,\
142 $(CC) /dev/null -c -o "$$TMPO" ; $(LD) $(1) "$$TMPO" -o "$$TMP",$(1),$(2))
143
138###### 144######
139 145
140### 146###