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authorSteven Rostedt <rostedt@goodmis.org>2008-05-14 21:30:29 -0400
committerThomas Gleixner <tglx@linutronix.de>2008-05-23 22:43:33 +0200
commit656ee82cc855027b2e994ad218519b09fa652cc1 (patch)
tree0f2aa6d2ce2c87a7086e2563f820926f552bab1c /kernel/Makefile
parent4e491d14f2506b218d678935c25a7027b79178b1 (diff)
kbuild: create new CFLAGS_REMOVE_(basename).o option
We currently have a way to add special CFLAGS to code, but we do not have a way to remove them if needed. With the case of ftrace, some files should simply not be profiled. Adding the -pg flag to these files is simply a waste, and adding "notrace" to each and every function is ugly. Currently we put in "Makefile turd" [1] to stop the compiler from adding -pg to certain files. This was clumsy and awkward. This patch now adds the revese of CFLAGS_(basename).o with CFLAGS_REMOVE_(basename).o. This allows developers to prevent certain CFLAGS from being used to compile files. For example, we can now do CFLAGS_REMOVE_string.o = -pg to remove the -pg option from the string.o file in the lib directory. Note: a space delimited list of options may be added to the REMOVE macro. [1] - what David Miller called the workaronud to remove -pg Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/Makefile')
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