| Message ID | 1406423095-18198-3-git-send-email-bryanhundven@gmail.com |
|---|---|
| State | Superseded |
| Headers | show |
Bryan, All, Here are a few comments... On 2014-07-26 18:04 -0700, Bryan Hundven spake thusly: > "Musl-libc is a new standard library to power a new generation of Linux-based > devices. musl is lightweight, fast, simple, free, and strives to be correct in > the sense of standards-conformance and safety." > > This patch adds support for musl to be selected and built by crosstool-ng. > NOTE: Experimental patches are needed for gcc and possibly other components. > Later patches include this support. I know we discussed this on IRC, but maybe we were too quick when setting up the plan. Maybe the patches could be added in this changeset, no? I can see that splitting is easier for review, but in the end, it does not really make sense to add musl support without the gcc patches, right? So, we may just squash your patches 2 and 3 into a single one when applying for upstreaming? > Signed-off-by: Bryan Hundven <bryanhundven@gmail.com> [--SNIP diffstat--] > diff --git a/config/libc.in b/config/libc.in > index 03f5db2..ff9ce9e 100644 > --- a/config/libc.in > +++ b/config/libc.in > @@ -28,6 +28,10 @@ config LIBC_SUPPORT_NPTL > bool > select LIBC_SUPPORT_THREADS_ANY > > +config LIBC_SUPPORT_MUSL > + bool > + select LIBC_SUPPORT_THREADS_ANY > + All changes in this file is to add a new type of threads implementation, specific to musl. I've pushed to a temporary WIP clone a reworked infra for threads; http://ymorin.is-a-geek.org/git/crosstool-ng/ yem/threads-rework So, all those changes you've done here should no longer be needed, hopefully. > config LIBC_SUPPORT_LINUXTHREADS > bool > select LIBC_SUPPORT_THREADS_ANY > @@ -42,6 +46,7 @@ config LIBC_SUPPORT_THREADS_NONE > config THREADS > string > default "nptl" if THREADS_NPTL > + default "musl" if THREADS_MUSL This default should now go into the musl.in file, as: config THREADS default "XXXX" We should see if XXX can be set to just "nptl" and abuse that so we have no special handling to do in the gcc build script. Otherwise, "musl" is a good compromise, but the gcc build script should be adapted accordingly, which I don't see in this patch. [--SNIP--] > diff --git a/config/libc/musl.in b/config/libc/musl.in > new file mode 100644 > index 0000000..69f465c > --- /dev/null > +++ b/config/libc/musl.in > @@ -0,0 +1,47 @@ > +# musl options > + > +## depends on ! WINDOWS && ! BARE_METAL > +## > +## select LIBC_SUPPORT_MUSL > +## select CC_CORE_PASSES_NEEDED > +## > +## help Musl is a new standard library to power a new generation of Linux-based > +## help devices. musl is lightweight, fast, simple, free, and strives to be > +## help correct in the sense of standards-conformance and safety. Here, add the "config THREADS" discussed just above. it needs not be conditional, since the parsing of this file is already conditional to musl being selected. > +choice > + bool > + prompt "musl version" > +# Don't remove next line > +# CT_INSERT_VERSION_BELOW > + > +config LIBC_MUSL_V_1_1_3 > + bool > + prompt "1.1.3 (Mainline)" > + select LIBC_MUSL_DEFAULTS > + depends on EXPERIMENTAL > + > +config LIBC_MUSL_V_1_0_3 > + bool > + prompt "1.0.3 (Stable)" > + select LIBC_MUSL_DEFAULTS > + > +config LIBC_MUSL_V_CUSTOM > + bool > + prompt "Custom musl" > + select LIBC_MUSL_DEFAULTS > + depends on EXPERIMENTAL > + > +endchoice > + > +config LIBC_MUSL_DEFAULTS > + bool > + select LIBC_SUPPORT_MUSL No longer needed. [--SNIP--] > diff --git a/config/libc/musl.in.2 b/config/libc/musl.in.2 > new file mode 100644 > index 0000000..bf4fb71 > --- /dev/null > +++ b/config/libc/musl.in.2 > @@ -0,0 +1,2 @@ > +# musl second-part options If there is nothing to set here, do not provide that file. [--SNIP--] > diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh > new file mode 100644 > index 0000000..f72517c > --- /dev/null > +++ b/scripts/build/libc/musl.sh > @@ -0,0 +1,111 @@ I have not completely reviewd that file, but have at least a few comments: [--SNIP--] > +do_libc_configure() { > + CT_DoLog EXTRA "Configuring C library" > + local -a extra_cflags > + > + # From buildroot: > + # gcc constant folding bug with weak aliases workaround > + # See http://www.openwall.com/lists/musl/2014/05/15/1 > + if [ "${CT_CC_GCC_4_9_or_later}" = "y" ]; then Completely off-topic: gcc-4.9 is utterly broken. See this thread where Linus Torvalds, in his usual coloured language, bashes gcc-4.9: http://lkml.iu.edu//hypermail/linux/kernel/1407.3/00650.html > + extra_cflags+=("-fno-toplevel-reorder") Is that still needed with the current version of musl? > + fi > + > + # NOTE: musl handles the build/host/target a little bit differently > + # then one would expect: > + # build : not used > + # host : the machine building musl > + # target : the machine musl runs on > + CT_DoExecLog CFG \ > + CFLAGS="${extra_cflags[@]}" \ > + CROSS_COMPILE="${CT_TARGET}-" \ > + ./configure \ > + --host="${CT_BUILD}" \ > + --target="${CT_TARGET}" \ > + --prefix="/usr" \ > + --disable-gcc-wrapper > +} > + > +do_libc_start_files() { > + local ARCH > + > + CT_DoStep INFO "Installing C library headers" > + > + # Simply copy files until musl has the ability to build out-of-tree > + CT_DoLog EXTRA "Copying sources to build directory" > + CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/musl-${CT_LIBC_VERSION}" \ > + "${CT_BUILD_DIR}/build-libc-headers" > + cd "${CT_BUILD_DIR}/build-libc-headers" > + > + # musl can be installed without gcc if arch is known > + case "${CT_TARGET}" in > + arm*) ARCH=arm ;; > + i?86*) ARCH=i386 ;; > + x86_64*) ARCH=x86_64 ;; > + mips-*|mipsel-*) ARCH=mips ;; > + microblaze-*) ARCH=microblaze ;; > + powerpc-*) ARCH=powerpc ;; > + sh-*|sh[34]-*) ARCH=sh ;; > + x32-*) ARCH=x32 ;; > + *) return 1 ;; > + esac You forgot to call do_libc_configure here. That should be the reason for the incorrect install daggs1-work reported incorrect install path (on IRC.) [--SNIP--] > diff --git a/scripts/functions b/scripts/functions > index 2e4d4fa..eae3b95 100644 > --- a/scripts/functions > +++ b/scripts/functions > @@ -1182,6 +1182,7 @@ CT_DoBuildTargetTuple() { > case "${CT_LIBC}" in > *glibc) CT_TARGET_SYS=gnu;; > uClibc) CT_TARGET_SYS=uclibc;; > + musl) CT_TARGET_SYS=musl;; > *) CT_TARGET_SYS=elf;; > esac Regards, Yann E. MORIN.
Yann, List, On Sun, Jul 27, 2014 at 4:15 PM, Yann E. MORIN <yann.morin.1998@free.fr> wrote: > Bryan, All, > > Here are a few comments... > > On 2014-07-26 18:04 -0700, Bryan Hundven spake thusly: >> "Musl-libc is a new standard library to power a new generation of Linux-based >> devices. musl is lightweight, fast, simple, free, and strives to be correct in >> the sense of standards-conformance and safety." >> >> This patch adds support for musl to be selected and built by crosstool-ng. >> NOTE: Experimental patches are needed for gcc and possibly other components. >> Later patches include this support. > > I know we discussed this on IRC, but maybe we were too quick when > setting up the plan. Maybe the patches could be added in this > changeset, no? > > I can see that splitting is easier for review, but in the end, it does > not really make sense to add musl support without the gcc patches, > right? So, we may just squash your patches 2 and 3 into a single one > when applying for upstreaming? Sure, I'll do that in my next revision. (*cough* plus some other fixes *cough*) :) >> Signed-off-by: Bryan Hundven <bryanhundven@gmail.com> > [--SNIP diffstat--] >> diff --git a/config/libc.in b/config/libc.in >> index 03f5db2..ff9ce9e 100644 >> --- a/config/libc.in >> +++ b/config/libc.in >> @@ -28,6 +28,10 @@ config LIBC_SUPPORT_NPTL >> bool >> select LIBC_SUPPORT_THREADS_ANY >> >> +config LIBC_SUPPORT_MUSL >> + bool >> + select LIBC_SUPPORT_THREADS_ANY >> + > > All changes in this file is to add a new type of threads implementation, > specific to musl. > > I've pushed to a temporary WIP clone a reworked infra for threads; > http://ymorin.is-a-geek.org/git/crosstool-ng/ yem/threads-rework > > So, all those changes you've done here should no longer be needed, > hopefully. Excellent! >> config LIBC_SUPPORT_LINUXTHREADS >> bool >> select LIBC_SUPPORT_THREADS_ANY >> @@ -42,6 +46,7 @@ config LIBC_SUPPORT_THREADS_NONE >> config THREADS >> string >> default "nptl" if THREADS_NPTL >> + default "musl" if THREADS_MUSL > > This default should now go into the musl.in file, as: > > config THREADS > default "XXXX" > > We should see if XXX can be set to just "nptl" and abuse that so we have > no special handling to do in the gcc build script. > > Otherwise, "musl" is a good compromise, but the gcc build script should > be adapted accordingly, which I don't see in this patch. Perfect! > [--SNIP--] >> diff --git a/config/libc/musl.in b/config/libc/musl.in >> new file mode 100644 >> index 0000000..69f465c >> --- /dev/null >> +++ b/config/libc/musl.in >> @@ -0,0 +1,47 @@ >> +# musl options >> + >> +## depends on ! WINDOWS && ! BARE_METAL >> +## >> +## select LIBC_SUPPORT_MUSL >> +## select CC_CORE_PASSES_NEEDED >> +## >> +## help Musl is a new standard library to power a new generation of Linux-based >> +## help devices. musl is lightweight, fast, simple, free, and strives to be >> +## help correct in the sense of standards-conformance and safety. > > Here, add the "config THREADS" discussed just above. > > it needs not be conditional, since the parsing of this file is already > conditional to musl being selected. Right. I like it! >> +choice >> + bool >> + prompt "musl version" >> +# Don't remove next line >> +# CT_INSERT_VERSION_BELOW >> + >> +config LIBC_MUSL_V_1_1_3 >> + bool >> + prompt "1.1.3 (Mainline)" >> + select LIBC_MUSL_DEFAULTS >> + depends on EXPERIMENTAL >> + >> +config LIBC_MUSL_V_1_0_3 >> + bool >> + prompt "1.0.3 (Stable)" >> + select LIBC_MUSL_DEFAULTS >> + >> +config LIBC_MUSL_V_CUSTOM >> + bool >> + prompt "Custom musl" >> + select LIBC_MUSL_DEFAULTS >> + depends on EXPERIMENTAL >> + >> +endchoice >> + >> +config LIBC_MUSL_DEFAULTS >> + bool >> + select LIBC_SUPPORT_MUSL > > No longer needed. Check! > [--SNIP--] >> diff --git a/config/libc/musl.in.2 b/config/libc/musl.in.2 >> new file mode 100644 >> index 0000000..bf4fb71 >> --- /dev/null >> +++ b/config/libc/musl.in.2 >> @@ -0,0 +1,2 @@ >> +# musl second-part options > > If there is nothing to set here, do not provide that file. Ack. > [--SNIP--] >> diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh >> new file mode 100644 >> index 0000000..f72517c >> --- /dev/null >> +++ b/scripts/build/libc/musl.sh >> @@ -0,0 +1,111 @@ > > I have not completely reviewd that file, but have at least a few > comments: > > [--SNIP--] >> +do_libc_configure() { >> + CT_DoLog EXTRA "Configuring C library" >> + local -a extra_cflags >> + >> + # From buildroot: >> + # gcc constant folding bug with weak aliases workaround >> + # See http://www.openwall.com/lists/musl/2014/05/15/1 >> + if [ "${CT_CC_GCC_4_9_or_later}" = "y" ]; then > > Completely off-topic: gcc-4.9 is utterly broken. See this thread where > Linus Torvalds, in his usual coloured language, bashes gcc-4.9: > http://lkml.iu.edu//hypermail/linux/kernel/1407.3/00650.html Technically: https://lkml.org/lkml/2014/7/24/584 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61904 "The bad compiler versions are 4.5.0 (when debug_insn came in) to 4.8.3 and 4.9.0 and 4.9.1." They are all broken, on host/build/target = x86_64, in some configurations. >> + extra_cflags+=("-fno-toplevel-reorder") > > Is that still needed with the current version of musl? Yes, I got this from buildroot. >> + fi >> + >> + # NOTE: musl handles the build/host/target a little bit differently >> + # then one would expect: >> + # build : not used >> + # host : the machine building musl >> + # target : the machine musl runs on >> + CT_DoExecLog CFG \ >> + CFLAGS="${extra_cflags[@]}" \ >> + CROSS_COMPILE="${CT_TARGET}-" \ >> + ./configure \ >> + --host="${CT_BUILD}" \ >> + --target="${CT_TARGET}" \ >> + --prefix="/usr" \ >> + --disable-gcc-wrapper >> +} >> + >> +do_libc_start_files() { >> + local ARCH >> + >> + CT_DoStep INFO "Installing C library headers" >> + >> + # Simply copy files until musl has the ability to build out-of-tree >> + CT_DoLog EXTRA "Copying sources to build directory" >> + CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/musl-${CT_LIBC_VERSION}" \ >> + "${CT_BUILD_DIR}/build-libc-headers" >> + cd "${CT_BUILD_DIR}/build-libc-headers" >> + >> + # musl can be installed without gcc if arch is known >> + case "${CT_TARGET}" in >> + arm*) ARCH=arm ;; >> + i?86*) ARCH=i386 ;; >> + x86_64*) ARCH=x86_64 ;; >> + mips-*|mipsel-*) ARCH=mips ;; >> + microblaze-*) ARCH=microblaze ;; >> + powerpc-*) ARCH=powerpc ;; >> + sh-*|sh[34]-*) ARCH=sh ;; >> + x32-*) ARCH=x32 ;; >> + *) return 1 ;; >> + esac > > You forgot to call do_libc_configure here. That should be the reason for > the incorrect install daggs1-work reported incorrect install path (on > IRC.) Yup, noted, as we discussed on irc. fixed in the next revision (should fix the sysroot/usr/local/musl/include issue). > [--SNIP--] >> diff --git a/scripts/functions b/scripts/functions >> index 2e4d4fa..eae3b95 100644 >> --- a/scripts/functions >> +++ b/scripts/functions >> @@ -1182,6 +1182,7 @@ CT_DoBuildTargetTuple() { >> case "${CT_LIBC}" in >> *glibc) CT_TARGET_SYS=gnu;; >> uClibc) CT_TARGET_SYS=uclibc;; >> + musl) CT_TARGET_SYS=musl;; >> *) CT_TARGET_SYS=elf;; >> esac > > Regards, > Yann E. MORIN. > > -- > .-----------------.--------------------.------------------.--------------------. > | Yann E. MORIN | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: | > | +33 662 376 056 | Software Designer | \ / CAMPAIGN | ___ | > | +33 223 225 172 `------------.-------: X AGAINST | \e/ There is no | > | http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL | v conspiracy. | > '------------------------------^-------^------------------^--------------------' Thanks for the review! -Bryan -- For unsubscribe information see http://sourceware.org/lists.html#faq
diff --git a/config/libc.in b/config/libc.in index 03f5db2..ff9ce9e 100644 --- a/config/libc.in +++ b/config/libc.in @@ -28,6 +28,10 @@ config LIBC_SUPPORT_NPTL bool select LIBC_SUPPORT_THREADS_ANY +config LIBC_SUPPORT_MUSL + bool + select LIBC_SUPPORT_THREADS_ANY + config LIBC_SUPPORT_LINUXTHREADS bool select LIBC_SUPPORT_THREADS_ANY @@ -42,6 +46,7 @@ config LIBC_SUPPORT_THREADS_NONE config THREADS string default "nptl" if THREADS_NPTL + default "musl" if THREADS_MUSL default "linuxthreads" if THREADS_LINUXTHREADS default "win32" if THREADS_WIN32THREADS default "none" if THREADS_NONE || LIBC_none @@ -55,6 +60,7 @@ choice bool prompt "Threading implementation to use:" default THREADS_NPTL if LIBC_SUPPORT_NPTL + default THREADS_MUSL if LIBC_SUPPORT_MUSL default THREADS_LINUXTHREADS if LIBC_SUPPORT_LINUXTHREADS && ! LIBC_SUPPORT_NPTL default THREADS_WIN32 if LIBC_SUPPORT_WIN32THREADS default THREADS_NONE if ! LIBC_SUPPORT_THREADS_ANY @@ -64,6 +70,11 @@ config THREADS_NPTL prompt "nptl" depends on LIBC_SUPPORT_NPTL +config THREADS_MUSL + bool + prompt "musl" + depends on LIBC_SUPPORT_MUSL + config THREADS_LINUXTHREADS bool prompt "linuxthreads" diff --git a/config/libc/musl.in b/config/libc/musl.in new file mode 100644 index 0000000..69f465c --- /dev/null +++ b/config/libc/musl.in @@ -0,0 +1,47 @@ +# musl options + +## depends on ! WINDOWS && ! BARE_METAL +## +## select LIBC_SUPPORT_MUSL +## select CC_CORE_PASSES_NEEDED +## +## help Musl is a new standard library to power a new generation of Linux-based +## help devices. musl is lightweight, fast, simple, free, and strives to be +## help correct in the sense of standards-conformance and safety. + +choice + bool + prompt "musl version" +# Don't remove next line +# CT_INSERT_VERSION_BELOW + +config LIBC_MUSL_V_1_1_3 + bool + prompt "1.1.3 (Mainline)" + select LIBC_MUSL_DEFAULTS + depends on EXPERIMENTAL + +config LIBC_MUSL_V_1_0_3 + bool + prompt "1.0.3 (Stable)" + select LIBC_MUSL_DEFAULTS + +config LIBC_MUSL_V_CUSTOM + bool + prompt "Custom musl" + select LIBC_MUSL_DEFAULTS + depends on EXPERIMENTAL + +endchoice + +config LIBC_MUSL_DEFAULTS + bool + select LIBC_SUPPORT_MUSL + +config LIBC_VERSION + string +# Don't remove next line +# CT_INSERT_VERSION_STRING_BELOW + default "1.1.3" if LIBC_MUSL_V_1_1_3 + default "1.0.3" if LIBC_MUSL_V_1_0_3 + default "custom" if LIBC_MUSL_V_CUSTOM diff --git a/config/libc/musl.in.2 b/config/libc/musl.in.2 new file mode 100644 index 0000000..bf4fb71 --- /dev/null +++ b/config/libc/musl.in.2 @@ -0,0 +1,2 @@ +# musl second-part options + diff --git a/scripts/build/arch/arm.sh b/scripts/build/arch/arm.sh index 430bdde..ba87e0c 100644 --- a/scripts/build/arch/arm.sh +++ b/scripts/build/arch/arm.sh @@ -17,6 +17,7 @@ CT_DoArchTupleValues() { case "${CT_LIBC},${CT_ARCH_ARM_EABI}" in *glibc,y) CT_TARGET_SYS=gnueabi;; uClibc,y) CT_TARGET_SYS=uclibcgnueabi;; + musl,y) CT_TARGET_SYS=muslgnueabi;; *,y) CT_TARGET_SYS=eabi;; esac diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh new file mode 100644 index 0000000..f72517c --- /dev/null +++ b/scripts/build/libc/musl.sh @@ -0,0 +1,111 @@ +# This file adds functions to build the musl C library +# Copyright 2013 Timo Teräs +# Licensed under the GPL v2. See COPYING in the root of this package + +do_libc_get() { + local libc_src + + libc_src="http://www.musl-libc.org/releases" + + if [ "${CT_LIBC_MUSL_CUSTOM}" = "y" ]; then + CT_GetCustom "musl" "${CT_LIBC_VERSION}" \ + "${CT_LIBC_MUSL_CUSTOM_LOCATION}" + else # ! custom location + CT_GetFile "musl-${CT_LIBC_VERSION}" "${libc_src}" + fi # ! custom location +} + +do_libc_extract() { + # If using custom directory location, nothing to do. + if [ "${CT_LIBC_MUSL_CUSTOM}" = "y" ]; then + # Abort if the custom directory is not found. + if ! [ -d "${CT_SRC_DIR}/musl-${CT_LIBC_VERSION}" ]; then + CT_Abort "Directory not found: ${CT_SRC_DIR}/musl-${CT_LIBC_VERSION}" + fi + + return 0 + fi + + CT_Extract "musl-${CT_LIBC_VERSION}" + CT_Patch "musl" "${CT_LIBC_VERSION}" +} + +do_libc_check_config() { + : +} + +do_libc_configure() { + CT_DoLog EXTRA "Configuring C library" + local -a extra_cflags + + # From buildroot: + # gcc constant folding bug with weak aliases workaround + # See http://www.openwall.com/lists/musl/2014/05/15/1 + if [ "${CT_CC_GCC_4_9_or_later}" = "y" ]; then + extra_cflags+=("-fno-toplevel-reorder") + fi + + # NOTE: musl handles the build/host/target a little bit differently + # then one would expect: + # build : not used + # host : the machine building musl + # target : the machine musl runs on + CT_DoExecLog CFG \ + CFLAGS="${extra_cflags[@]}" \ + CROSS_COMPILE="${CT_TARGET}-" \ + ./configure \ + --host="${CT_BUILD}" \ + --target="${CT_TARGET}" \ + --prefix="/usr" \ + --disable-gcc-wrapper +} + +do_libc_start_files() { + local ARCH + + CT_DoStep INFO "Installing C library headers" + + # Simply copy files until musl has the ability to build out-of-tree + CT_DoLog EXTRA "Copying sources to build directory" + CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/musl-${CT_LIBC_VERSION}" \ + "${CT_BUILD_DIR}/build-libc-headers" + cd "${CT_BUILD_DIR}/build-libc-headers" + + # musl can be installed without gcc if arch is known + case "${CT_TARGET}" in + arm*) ARCH=arm ;; + i?86*) ARCH=i386 ;; + x86_64*) ARCH=x86_64 ;; + mips-*|mipsel-*) ARCH=mips ;; + microblaze-*) ARCH=microblaze ;; + powerpc-*) ARCH=powerpc ;; + sh-*|sh[34]-*) ARCH=sh ;; + x32-*) ARCH=x32 ;; + *) return 1 ;; + esac + + CT_DoLog EXTRA "Installing headers" + CT_DoExecLog ALL make ARCH="${ARCH}" install-headers DESTDIR="${CT_SYSROOT_DIR}/" + + CT_EndStep +} + +do_libc() { + CT_DoStep INFO "Installing C library" + + # Simply copy files until musl has the ability to build out-of-tree + CT_DoLog EXTRA "Copying sources to build directory" + CT_DoExecLog ALL cp -av "${CT_SRC_DIR}/musl-${CT_LIBC_VERSION}" \ + "${CT_BUILD_DIR}/build-libc" + cd "${CT_BUILD_DIR}/build-libc" + + do_libc_configure + + CT_DoLog EXTRA "Building C library" + CT_DoExecLog ALL make ${JOBSFLAGS} + + CT_DoLog EXTRA "Installing C library" + CT_DoExecLog ALL make install DESTDIR="${CT_SYSROOT_DIR}/" + + CT_EndStep +} diff --git a/scripts/functions b/scripts/functions index 2e4d4fa..eae3b95 100644 --- a/scripts/functions +++ b/scripts/functions @@ -1182,6 +1182,7 @@ CT_DoBuildTargetTuple() { case "${CT_LIBC}" in *glibc) CT_TARGET_SYS=gnu;; uClibc) CT_TARGET_SYS=uclibc;; + musl) CT_TARGET_SYS=musl;; *) CT_TARGET_SYS=elf;; esac
"Musl-libc is a new standard library to power a new generation of Linux-based devices. musl is lightweight, fast, simple, free, and strives to be correct in the sense of standards-conformance and safety." This patch adds support for musl to be selected and built by crosstool-ng. NOTE: Experimental patches are needed for gcc and possibly other components. Later patches include this support. Signed-off-by: Bryan Hundven <bryanhundven@gmail.com> --- config/libc.in | 11 +++++ config/libc/musl.in | 47 +++++++++++++++++++ config/libc/musl.in.2 | 2 + scripts/build/arch/arm.sh | 1 + scripts/build/libc/musl.sh | 111 +++++++++++++++++++++++++++++++++++++++++++++ scripts/functions | 1 + 6 files changed, 173 insertions(+) create mode 100644 config/libc/musl.in create mode 100644 config/libc/musl.in.2 create mode 100644 scripts/build/libc/musl.sh