diff options
Diffstat (limited to 'contrib/depends/patches/icu4c')
| -rw-r--r-- | contrib/depends/patches/icu4c/icu-001-dont-build-static-dynamic-twice.patch | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/contrib/depends/patches/icu4c/icu-001-dont-build-static-dynamic-twice.patch b/contrib/depends/patches/icu4c/icu-001-dont-build-static-dynamic-twice.patch new file mode 100644 index 000000000..bbd4e99e7 --- /dev/null +++ b/contrib/depends/patches/icu4c/icu-001-dont-build-static-dynamic-twice.patch @@ -0,0 +1,37 @@ +Don't build object files twice + +When passed --enable-static and --enable-shared, icu will generate +both a shared and a static version of its libraries. + +However, in order to do so, it builds each and every object file +twice: once with -fPIC (for the shared library), and once without +-fPIC (for the static library). While admittedly building -fPIC for a +static library generates a slightly suboptimal code, this is what all +the autotools-based project are doing. They build each object file +once, and they use it for both the static and shared libraries. + +icu builds the object files for the shared library as .o files, and +the object files for static library as .ao files. By simply changing +the suffix of object files used for static libraries to ".o", we tell +icu to use the ones built for the shared library (i.e, with -fPIC), +and avoid the double build of icu. + +On a fast build server, this brings the target icu build from +3m41.302s down to 1m43.926s (approximate numbers: some other builds +are running on the system at the same time). + +Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> + +Index: b/source/config/mh-linux +=================================================================== +--- a/source/config/mh-linux ++++ b/source/config/mh-linux +@@ -38,7 +38,7 @@ + ## Shared object suffix + SO = so + ## Non-shared intermediate object suffix +-STATIC_O = ao ++STATIC_O = o + + ## Compilation rules + %.$(STATIC_O): $(srcdir)/%.c |