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authorSam Ravnborg <sam@ravnborg.org>2009-09-19 12:31:45 +0400
committerSam Ravnborg <sam@ravnborg.org>2009-09-20 14:27:42 +0400
commit691ef3e7fdc1fe4dded169d9404f740987f67d66 (patch)
tree06e8842f0dd8bb015b678a96655e8c2f17baaaa5 /Documentation/kbuild
parentf86fd306605287d7c7f4f0f8e8e2a9d49d28b396 (diff)
downloadlinux-691ef3e7fdc1fe4dded169d9404f740987f67d66.tar.xz
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 'Documentation/kbuild')
-rw-r--r--Documentation/kbuild/makefiles.txt14
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index 7847fce13bd6..71c602d61680 100644
--- a/Documentation/kbuild/makefiles.txt
+++ b/Documentation/kbuild/makefiles.txt
@@ -18,6 +18,7 @@ This document describes the Linux kernel Makefiles.
--- 3.9 Dependency tracking
--- 3.10 Special Rules
--- 3.11 $(CC) support functions
+ --- 3.12 $(LD) support functions
=== 4 Host Program support
--- 4.1 Simple Host Program
@@ -570,6 +571,19 @@ more details, with real examples.
endif
endif
+--- 3.12 $(LD) support functions
+
+ ld-option
+ ld-option is used to check if $(LD) supports the supplied option.
+ ld-option takes two options as arguments.
+ The second argument is an optional option that can be used if the
+ first option is not supported by $(LD).
+
+ Example:
+ #Makefile
+ LDFLAGS_vmlinux += $(call really-ld-option, -X)
+
+
=== 4 Host Program support
Kbuild supports building executables on the host for use during the