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* Makefile: make it possible to build arch specific C filesrofl0r2013-02-061-1/+1
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* offer REALGCC variable to configure musl-gcc wrapper at runtimeRich Felker2012-09-211-1/+1
| | | | | | this is useful when the underlying gcc is already a wrapper, which is the case at least on some uclibc-based system images. it's also useful for running an older/newer/nondefault version of gcc.
* remove forced -O3 from shared library CFLAGSRich Felker2012-09-141-1/+1
| | | | | | | | | | | I originally added -O3 for shared libraries to counteract very bad behavior by GCC when building PIC code: it insists on reloading the GOT register in static functions that need it, even if the address of the function is never leaked from the translation unit and all local callers of the function have already loaded the GOT register. this measurably degrades performance in a few key areas like malloc. the inlining done at -O3 avoids the issue, but that's really not a good reason for overriding the user's choice of optimization level.
* split up installation targetRich Felker2012-08-171-2/+10
| | | | patch by Luca Barbato (lu_zero)
* make dynlink.lo depend on reloc.h in makefileRich Felker2012-08-051-0/+2
| | | | | | this is mainly a development convenience but will also ensure users building from latest git always get up-to-date arch-specific dynamic linker code without having to "make clean".
* abstract out compiler runtime library for linking libc.soRich Felker2012-08-021-1/+2
| | | | | this allows config.mak to override the default -lgcc for building with other compilers such as pcc/clang/etc.
* changes to kernel sigaction struct handling in preparation for mips portRich Felker2012-07-111-1/+1
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* improve the build rules for installing /lib/ld-musl-$ARCH.soRich Felker2012-05-041-2/+4
| | | | | | these new rules should avoid spurious error messages when the directory (usually /lib) and the dynamic linker symlink already exist, and minimize the spam when they can't be created.
* make all .o files depend on *_impl.h and libc.hRich Felker2012-05-031-2/+3
| | | | | | | | | | | | | hopefully the annoyance of this will be minimal. these files all define internal interfaces which can change at any time; if different modules are using different versions of the interfaces, the library will badly break. ideally we would scan and add the dependency only for C files that actually reference the affected interfaces, but for now, err on the side of caution and force a rebuild of everything if any of them have changed. this commit is in preparation for the upcoming ssp overhaul commit, which will change internals of the pthread struct.
* PIE support for i386Rich Felker2012-05-021-1/+1
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* reorganize Makefile to support "least surprise" config/make semanticsRich Felker2012-05-011-11/+23
| | | | | | | | | | | the major change here is that CFLAGS is now a variable that can be changed entirely under user control, without causing essential flags to be lost. previously, "CFLAGS += ..." was valid in config.mak, but using "CFLAGS = ..." in config.mak would have badly broken the build process unless the user took care to copy the necessary flags out of the main Makefile. I have also added a distclean target that removes config.mak.
* remove objcopy --weaken from the makefileRich Felker2012-05-011-2/+0
| | | | | | | | as far as I can tell, it's not useful and never way. I wrote it way back under the assumption that non-weak symbols in the POSIX or extension namespace could conflict with legitimate uses of the same symbol name in the main program or other libraries, but that does not seem to be the case.
* new gcc wrapper, entirely specfile basedRich Felker2012-04-221-3/+7
| | | | | | | | | | | | | the _concept_ of this wrapper has been tested extensively, but the integration with the build/install system, and using a persistent specfile rather than one generated at build-time, have not been heavily tested and may need minor tweaks. this approach should be a lot more robust (and easier to improve) than writing a shell script that's responsible for trying to mimic gcc's logic about whether it's compiling or linking, building shared libs or executable files, etc. it's also lighter weight and should result in mildly faster builds when using the wrapper.
* don't fail on inability to install dynamic linker (e.g. if not root)Rich Felker2012-03-171-1/+1
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* search internal headers firstRich Felker2012-03-011-1/+1
| | | | this is necessitated by the ugly <syscall.h> just added
* two fixes for "make install" handling of shared libsRich Felker2012-02-171-1/+2
| | | | | | | | 1. don't try to install (and thus build) shared libs when they were disabled in config.mak 2. ensure that the path for the dynamic linker exists before attempting to install it.
* fix a few bugs from last dynamic linking build system commitRich Felker2011-06-281-2/+2
| | | | some cruft was left and DESTDIR was not being used correctly.
* cleanup shared library build system to be more $HOME-local-install friendlyRich Felker2011-06-271-13/+15
| | | | | the path for the dynamic linker is now configurable, and failure to install the symlink for it will not stop the build.
* use soname in ld-musl.so to prevent filename appearing in DT_NEEDEDsRich Felker2011-06-241-1/+1
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* use symlink rather than bogus linker script for libc.soRich Felker2011-06-241-2/+2
| | | | the linker script caused a bogus DT_NEEDED entry
* adapt build/install/gcc-wrapper systems for dynamic linking supportRich Felker2011-06-231-5/+15
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* various changes in preparation for dynamic linking supportRich Felker2011-02-241-3/+3
| | | | | | | | | | | | | | | | | prefer using visibility=hidden for __libc internal data, rather than an accessor function, if the compiler has visibility. optimize with -O3 for PIC targets (shared library). without heavy inlining, reloading the GOT register in small functions kills performance. 20-30% size increase for a single libc.so is not a big deal, compared to comparaible size increase in every static binaries. use -Bsymbolic-functions, not -Bsymbolic. global variables are subject to COPY relocations, and thus binding their addresses in the library at link time will cause library functions to read the wrong (original) copies instead of the copies made in the main program's bss section. add entry point, _start, for dynamic linker.
* avoid deleting the lib/empty fileRich Felker2011-02-171-1/+1
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* new solution for empty lib dir (old one had some problems)Rich Felker2011-02-171-7/+5
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* improve Makefile handling of git checkouts with missing lib/ and config.makRich Felker2011-02-171-4/+8
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* finish unifying thread register handling in preparation for portingRich Felker2011-02-151-1/+1
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* preparing build system to handle ports - step 1Rich Felker2011-02-151-0/+6
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* ensure that musl is compiled as C99 code & XSI option is available in headersRich Felker2011-02-131-1/+1
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* initial check-in, version 0.5.0 v0.5.0Rich Felker2011-02-121-0/+97