I'd like to get the NDK rebuilt with -fPIC so we can remove most of the text relocations in the libraries we build on Android. Text relocations slow down startup and increase memory usage. I basically did this to get it building with -fPIC: --- a/build/tools/patches/005-flags.patch +++ b/build/tools/patches/005-flags.patch @@ -6,8 +6,8 @@ index 670b620..06c95e9 100644 LDFLAGS_FOR_TARGET=-mandroid CFLAGS_FOR_TARGET+= -DANDROID -D__ANDROID__ -+CFLAGS_FOR_TARGET+= -fexceptions -+CXXFLAGS_FOR_TARGET+= -frtti ++CFLAGS_FOR_TARGET+= -fexceptions -fPIC ++CXXFLAGS_FOR_TARGET+= -frtti -fPIC # Helper prefix-list = $(foreach e, $(2), $(join $1, $e)) I followed the latest instructions on the crystax site to build it. (which are a little different now.. the source pulling part pulls code from a specific date now)
From bug 646843: Mike Hommey [:glandium]: Currently libgcc.a and libstdc++.a are not built as PIC. From my experiments, this should get us between 2 and 5% less time spent before main(), provided bug 646815 is fixed as well.
Bear - What's the status here?
tracking-fennec: --- → ?
(In reply to comment #3) > Bear - What's the status here? it's on my task list. right now i'm buildduty and will get back to it after buildduty.
7 years ago
Depends on: 657723
Bear is working on deploying the r5 NDK via puppet right now (Bug 657723). Once that's done, we'll revisit this bug and re-compile r5 with -fPIC.
From bug 646843: From my experiments, all that is needed is to add --with-pic as a compile option to gcc (which I did through build/tools/build-gcc.sh), and add -fPIC to libgcc config options (which I did through the TARGET_LIBGCC2_CFLAGS variable in src/gcc/gcc-4.4.0/gcc/config/arm/t-arm-softfp, though there's probably a better place)
7 years ago
Whiteboard: [ts] → [ts][mobile]
Whiteboard: [ts][mobile] → [ts][mobile], mobilestartupshrink
Summary: Rebuild Android NDK with PIC → Rebuild Android NDK v5 with PIC
edited bug title to be very clear that we will be compiling only the r5 NDK with -fPIC support
glandium noted in IRC that PIC support may already be in NDK5.
yep, good catch - according to http://groups.google.com/group/android-ndk/browse_thread/thread/9fd148aa92a6fab6 PIC is available and enabled by default with NDK5
Status: NEW → RESOLVED
Last Resolved: 7 years ago
Resolution: --- → INVALID
Product: mozilla.org → Release Engineering
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