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-rw-r--r--Documentation/kbuild/makefiles.txt20
1 files changed, 17 insertions, 3 deletions
diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
index d76cfd8712e1..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
@@ -435,14 +436,14 @@ more details, with real examples.
The second argument is optional, and if supplied will be used
if first argument is not supported.
- ld-option
- ld-option is used to check if $(CC) when used to link object files
+ cc-ldoption
+ cc-ldoption is used to check if $(CC) when used to link object files
supports the given option. An optional second option may be
specified if first option are not supported.
Example:
#arch/i386/kernel/Makefile
- vsyscall-flags += $(call ld-option, -Wl$(comma)--hash-style=sysv)
+ vsyscall-flags += $(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
In the above example, vsyscall-flags will be assigned the option
-Wl$(comma)--hash-style=sysv if it is supported by $(CC).
@@ -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