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| author | markj <markj@FreeBSD.org> | 2015-02-18 03:54:54 +0000 |
|---|---|---|
| committer | markj <markj@FreeBSD.org> | 2015-02-18 03:54:54 +0000 |
| commit | 766a186dd8a6ed0ec8d2ba9f2ac7e4f7d8b7e85c (patch) | |
| tree | 5ef309e19daa5a505406b7f2926c31f722790437 /share | |
| parent | da9de450af5aa5a374c543d89f57cc4ba3edc7bb (diff) | |
| download | FreeBSD-src-766a186dd8a6ed0ec8d2ba9f2ac7e4f7d8b7e85c.zip FreeBSD-src-766a186dd8a6ed0ec8d2ba9f2ac7e4f7d8b7e85c.tar.gz | |
Remove drti.o's dependency on libelf. This makes it possible to add DTrace
probes to userland programs and libraries without also needing to link
libelf.
dtrace -G places the __SUNW_dof symbol at the beginning of the DOF (DTrace
probe and provider metdata) section in the generated object file; drti.o
now just uses this symbol to locate the section. A complication occurs
when multiple dtrace-generated object files are linked together, since the
__SUNW_dof symbol defined in each file is global. This is handled by
using objcopy(1) to convert __SUNW_dof to a local symbol once drti.o has
been linked with the generated object file. Upstream, this is done using a
linker feature not present in GNU ld.
Differential Revision: https://reviews.freebsd.org/D1757
Reviewed by: rpaulo
MFC after: 1 month
Relnotes: yes
Diffstat (limited to 'share')
| -rw-r--r-- | share/mk/bsd.dep.mk | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/share/mk/bsd.dep.mk b/share/mk/bsd.dep.mk index a43df82..407158c 100644 --- a/share/mk/bsd.dep.mk +++ b/share/mk/bsd.dep.mk @@ -121,10 +121,7 @@ ${_YC:R}.o: ${_YC} .endfor # DTrace probe definitions -# libelf is currently needed for drti.o .if ${SRCS:M*.d} -LDADD+= -lelf -DPADD+= ${LIBELF} CFLAGS+= -I${.OBJDIR} .endif .for _DSRC in ${SRCS:M*.d:N*/*} |
