Hi
While working on the Darwin LTO issues I noticed that collect2 looks for
"-flto-partition=none” in its command line option, but it doesn’t get passed.
So - is the attached patch the right idea, or should collect2 be looking in the
COLLECT_GCC_OPTIONS as the lto-wrapper does?
(or maybe it should just be just "%{fno-lto} %{flto*}" ?)
I plan on making Darwin default to fno-lto for link unless there’s an “flto*”
on the link line, since otherwise there’s a process launch for every object on
the c/l to do “nm”, which is quite heavy weight. At present, ISTM if the
compiler is configured with —enable-lto, the link line defaults to assuming
that every object needs to be checked.
Iain.
diff --git a/gcc/gcc.c b/gcc/gcc.c
index 780d485..bc9772b 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -1038,7 +1038,7 @@ proper position among the other output files. */
%(linker) " \
LINK_PLUGIN_SPEC \
"%{flto|flto=*:%<fcompare-debug*} \
- %{flto} %{fno-lto} %{flto=*} %l " LINK_PIE_SPEC \
+ %{flto} %{flto-*} %{fno-lto} %{flto=*} %l " LINK_PIE_SPEC \
"%{fuse-ld=*:-fuse-ld=%*} " LINK_COMPRESS_DEBUG_SPEC \
"%X %{o*} %{e*} %{N} %{n} %{r}\
%{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}} \
