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* [PATCH 1/5] libc/musl: Remove gcc core pass-1 from musl-libc build
  2014-09-05  6:34 [PATCH v3 0/5] Add musl-libc options Bryan Hundven
                   ` (2 preceding siblings ...)
  2014-09-05  6:34 ` [PATCH 5/5] config/gcc: Disable CC_GCC_LIBSANITIZER for musl-libc Bryan Hundven
@ 2014-09-05  6:34 ` Bryan Hundven
  2014-09-05  7:01   ` Bryan Hundven
  2014-09-05  6:34 ` [PATCH 2/5] libc/musl: Add options for optimization Bryan Hundven
  2014-09-11 21:28 ` [PATCH v3 0/5] Add musl-libc options Yann E. MORIN
  5 siblings, 1 reply; 9+ messages in thread
From: Bryan Hundven @ 2014-09-05  6:34 UTC (permalink / raw)
  To: Yann E. MORIN; +Cc: crossgcc, Bryan Hundven

In an effort to make the toolchain build simpler, remove the need for
the pass-1 build of gcc.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
---
 config/libc/musl.in        | 2 +-
 scripts/build/libc/musl.sh | 9 +--------
 2 files changed, 2 insertions(+), 9 deletions(-)

diff --git a/config/libc/musl.in b/config/libc/musl.in
index b3bec26..8f393b2 100644
--- a/config/libc/musl.in
+++ b/config/libc/musl.in
@@ -3,7 +3,7 @@
 ## depends on ! WINDOWS && ! BARE_METAL
 ##
 ## select LIBC_SUPPORT_THREADS_NATIVE
-## select CC_CORE_PASSES_NEEDED
+## select CC_CORE_PASS_2_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
diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh
index 7172cf2..f997d25 100644
--- a/scripts/build/libc/musl.sh
+++ b/scripts/build/libc/musl.sh
@@ -48,7 +48,7 @@ do_libc_configure() {
     # NOTE: musl handles the build/host/target a little bit differently
     # then one would expect:
     #   build   : not used
-    #   host    : the machine building musl
+    #   host    : the machine musl runs on
     #   target  : the machine musl runs on
     CT_DoExecLog CFG                \
     CFLAGS="${extra_cflags[@]}"     \
@@ -73,13 +73,6 @@ do_libc_start_files() {
 
     CT_DoLog EXTRA "Installing headers"
     CT_DoExecLog ALL make DESTDIR="${CT_SYSROOT_DIR}" install-headers
-
-    CT_DoExecLog ALL make DESTDIR="${CT_SYSROOT_DIR}" \
-        crt/crt1.o crt/crti.o crt/crtn.o
-    CT_DoExecLog ALL cp -av crt/crt*.o "${CT_SYSROOT_DIR}/usr/lib"
-    CT_DoExecLog ALL ${CT_TARGET}-gcc -nostdlib \
-        -nostartfiles -shared -x c /dev/null -o "${CT_SYSROOT_DIR}/usr/lib/libc.so"
-    CT_EndStep
 }
 
 do_libc() {
-- 
2.1.0


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^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH 4/5] libc/musl: Add config option for extra developer warnings
  2014-09-05  6:34 [PATCH v3 0/5] Add musl-libc options Bryan Hundven
  2014-09-05  6:34 ` [PATCH 3/5] libc/musl: Add config option for debugging info Bryan Hundven
@ 2014-09-05  6:34 ` Bryan Hundven
  2014-09-05  6:34 ` [PATCH 5/5] config/gcc: Disable CC_GCC_LIBSANITIZER for musl-libc Bryan Hundven
                   ` (3 subsequent siblings)
  5 siblings, 0 replies; 9+ messages in thread
From: Bryan Hundven @ 2014-09-05  6:34 UTC (permalink / raw)
  To: Yann E. MORIN; +Cc: crossgcc, Bryan Hundven

This commit adds a configuration knob for enabling extra developer
warnings to be enabled during the musl-libc build.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
---
 config/libc/musl.in.2      | 6 ++++++
 scripts/build/libc/musl.sh | 4 ++++
 2 files changed, 10 insertions(+)

diff --git a/config/libc/musl.in.2 b/config/libc/musl.in.2
index 5c265c8..f4abcc4 100644
--- a/config/libc/musl.in.2
+++ b/config/libc/musl.in.2
@@ -7,6 +7,12 @@ config LIBC_MUSL_DEBUG
       This option enables debugging information, this will increase the size of
       the resulting library.
 
+config LIBC_MUSL_WARNINGS
+    bool
+    prompt "Build with recommended warnings flags"
+    help
+      Build musl-libc with extra warnings, useful for musl-libc development.
+
 choice
     prompt "How to optimize musl-libc"
     default LIBC_MUSL_OPTIMIZE_AUTO
diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh
index 2690bf2..9aa5dc1 100644
--- a/scripts/build/libc/musl.sh
+++ b/scripts/build/libc/musl.sh
@@ -50,6 +50,10 @@ do_libc_configure() {
         extra_config+=("--enable-debug")
     fi
 
+    if [ "${CT_LIBC_MUSL_WARNINGS}" = "y" ]; then
+        extra_config+=("--enable-warnings")
+    fi
+
     extra_config+=( "--enable-optimize=${CT_LIBC_MUSL_OPTIMIZE}" )
 
     # NOTE: musl handles the build/host/target a little bit differently
-- 
2.1.0


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^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v3 0/5] Add musl-libc options
@ 2014-09-05  6:34 Bryan Hundven
  2014-09-05  6:34 ` [PATCH 3/5] libc/musl: Add config option for debugging info Bryan Hundven
                   ` (5 more replies)
  0 siblings, 6 replies; 9+ messages in thread
From: Bryan Hundven @ 2014-09-05  6:34 UTC (permalink / raw)
  To: Yann E. MORIN; +Cc: crossgcc

Many typos and fixes to suggestions made by y_morin and sh4rm4 in #crosstool-ng, here is v3. Enjoy!

-Bryan

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH 2/5] libc/musl: Add options for optimization
  2014-09-05  6:34 [PATCH v3 0/5] Add musl-libc options Bryan Hundven
                   ` (3 preceding siblings ...)
  2014-09-05  6:34 ` [PATCH 1/5] libc/musl: Remove gcc core pass-1 from musl-libc build Bryan Hundven
@ 2014-09-05  6:34 ` Bryan Hundven
  2014-09-11 21:28 ` [PATCH v3 0/5] Add musl-libc options Yann E. MORIN
  5 siblings, 0 replies; 9+ messages in thread
From: Bryan Hundven @ 2014-09-05  6:34 UTC (permalink / raw)
  To: Yann E. MORIN; +Cc: crossgcc, Bryan Hundven

This commit adds configuration knobs for optimizing musl-libc.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
---
 config/libc/musl.in.2      | 38 ++++++++++++++++++++++++++++++++++++++
 scripts/build/libc/musl.sh |  6 +++++-
 2 files changed, 43 insertions(+), 1 deletion(-)
 create mode 100644 config/libc/musl.in.2

diff --git a/config/libc/musl.in.2 b/config/libc/musl.in.2
new file mode 100644
index 0000000..32e9013
--- /dev/null
+++ b/config/libc/musl.in.2
@@ -0,0 +1,38 @@
+# musl second-part option
+
+choice
+    prompt "How to optimize musl-libc"
+    default LIBC_MUSL_OPTIMIZE_AUTO
+
+config LIBC_MUSL_OPTIMIZE_NONE
+    bool
+    prompt "Do not optimize musl-libc"
+    help
+      This option sets `--enable-optimize=no' to disable optimization.
+
+config LIBC_MUSL_OPTIMIZE_AUTO
+    bool
+    prompt "Use musl-libc's automatic optimization"
+    help
+      This option sets `--enable-optimize=auto' to automatically set optimization.
+
+config LIBC_MUSL_OPTIMIZE_SPEED
+    bool
+    prompt "Optimize musl-libc for speed"
+    help
+      This option sets `--enable-optimize=yes' to set optimization to -O3 for speed.
+
+config LIBC_MUSL_OPTIMIZE_SIZE
+    bool
+    prompt "Optimize musl-libc for size"
+    help
+      This option sets `--enable-optimize=size' to set optimization to -Os for size.
+
+endchoice
+
+config LIBC_MUSL_OPTIMIZE
+    string
+    default "no"   if LIBC_MUSL_OPTIMIZE_NONE
+    default "auto" if LIBC_MUSL_OPTIMIZE_AUTO
+    default "yes"  if LIBC_MUSL_OPTIMIZE_SPEED
+    default "size" if LIBC_MUSL_OPTIMIZE_SIZE
diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh
index f997d25..d1aadfa 100644
--- a/scripts/build/libc/musl.sh
+++ b/scripts/build/libc/musl.sh
@@ -37,6 +37,7 @@ do_libc_check_config() {
 do_libc_configure() {
     CT_DoLog EXTRA "Configuring C library"
     local -a extra_cflags
+    local -a extra_config
 
     # From buildroot:
     # gcc constant folding bug with weak aliases workaround
@@ -45,6 +46,8 @@ do_libc_configure() {
         extra_cflags+=("-fno-toplevel-reorder")
     fi
 
+    extra_config+=( "--enable-optimize=${CT_LIBC_MUSL_OPTIMIZE}" )
+
     # NOTE: musl handles the build/host/target a little bit differently
     # then one would expect:
     #   build   : not used
@@ -57,7 +60,8 @@ do_libc_configure() {
         --host="${CT_TARGET}"       \
         --target="${CT_TARGET}"     \
         --prefix="/usr"             \
-        --disable-gcc-wrapper
+        --disable-gcc-wrapper       \
+        "${extra_config[@]}"
 }
 
 do_libc_start_files() {
-- 
2.1.0


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^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH 5/5] config/gcc: Disable CC_GCC_LIBSANITIZER for musl-libc
  2014-09-05  6:34 [PATCH v3 0/5] Add musl-libc options Bryan Hundven
  2014-09-05  6:34 ` [PATCH 3/5] libc/musl: Add config option for debugging info Bryan Hundven
  2014-09-05  6:34 ` [PATCH 4/5] libc/musl: Add config option for extra developer warnings Bryan Hundven
@ 2014-09-05  6:34 ` Bryan Hundven
  2014-09-05  6:34 ` [PATCH 1/5] libc/musl: Remove gcc core pass-1 from musl-libc build Bryan Hundven
                   ` (2 subsequent siblings)
  5 siblings, 0 replies; 9+ messages in thread
From: Bryan Hundven @ 2014-09-05  6:34 UTC (permalink / raw)
  To: Yann E. MORIN; +Cc: crossgcc, Bryan Hundven

Disable libsanitizer for musl-libc.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
---
 config/cc/gcc.in.2 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/config/cc/gcc.in.2 b/config/cc/gcc.in.2
index 1b9515c..b088515 100644
--- a/config/cc/gcc.in.2
+++ b/config/cc/gcc.in.2
@@ -148,7 +148,7 @@ config CC_GCC_LIBSANITIZER
     prompt "Compile libsanitizer"
     depends on CC_GCC_HAS_LIBSANITIZER
     depends on THREADS_NATIVE
-    depends on ! LIBC_uClibc # Currently lacks required headers (like netrom.h)
+    depends on ! LIBC_uClibc && ! LIBC_musl # Currently lacks required headers (like netrom.h)
     help
       libsanitizer is a library which provides run-time sanitising of either
       or both of:
-- 
2.1.0


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^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH 3/5] libc/musl: Add config option for debugging info
  2014-09-05  6:34 [PATCH v3 0/5] Add musl-libc options Bryan Hundven
@ 2014-09-05  6:34 ` Bryan Hundven
  2014-09-05  6:34 ` [PATCH 4/5] libc/musl: Add config option for extra developer warnings Bryan Hundven
                   ` (4 subsequent siblings)
  5 siblings, 0 replies; 9+ messages in thread
From: Bryan Hundven @ 2014-09-05  6:34 UTC (permalink / raw)
  To: Yann E. MORIN; +Cc: crossgcc, Bryan Hundven

This option enables a configuration knob for adding debugging info.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
---
 config/libc/musl.in.2      | 7 +++++++
 scripts/build/libc/musl.sh | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/config/libc/musl.in.2 b/config/libc/musl.in.2
index 32e9013..5c265c8 100644
--- a/config/libc/musl.in.2
+++ b/config/libc/musl.in.2
@@ -1,5 +1,12 @@
 # musl second-part option
 
+config LIBC_MUSL_DEBUG
+    bool
+    prompt "Build with debugging information"
+    help
+      This option enables debugging information, this will increase the size of
+      the resulting library.
+
 choice
     prompt "How to optimize musl-libc"
     default LIBC_MUSL_OPTIMIZE_AUTO
diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh
index d1aadfa..2690bf2 100644
--- a/scripts/build/libc/musl.sh
+++ b/scripts/build/libc/musl.sh
@@ -46,6 +46,10 @@ do_libc_configure() {
         extra_cflags+=("-fno-toplevel-reorder")
     fi
 
+    if [ "${CT_LIBC_MUSL_DEBUG}" = "y" ]; then
+        extra_config+=("--enable-debug")
+    fi
+
     extra_config+=( "--enable-optimize=${CT_LIBC_MUSL_OPTIMIZE}" )
 
     # NOTE: musl handles the build/host/target a little bit differently
-- 
2.1.0


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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH 1/5] libc/musl: Remove gcc core pass-1 from musl-libc build
  2014-09-05  6:34 ` [PATCH 1/5] libc/musl: Remove gcc core pass-1 from musl-libc build Bryan Hundven
@ 2014-09-05  7:01   ` Bryan Hundven
  0 siblings, 0 replies; 9+ messages in thread
From: Bryan Hundven @ 2014-09-05  7:01 UTC (permalink / raw)
  To: Yann E. MORIN; +Cc: crossgcc maillist, Bryan Hundven

Yann, List,

On Thu, Sep 4, 2014 at 11:33 PM, Bryan Hundven <bryanhundven@gmail.com> wrote:
> In an effort to make the toolchain build simpler, remove the need for
> the pass-1 build of gcc.
>
> Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
> ---
>  config/libc/musl.in        | 2 +-
>  scripts/build/libc/musl.sh | 9 +--------
>  2 files changed, 2 insertions(+), 9 deletions(-)
>
> diff --git a/config/libc/musl.in b/config/libc/musl.in
> index b3bec26..8f393b2 100644
> --- a/config/libc/musl.in
> +++ b/config/libc/musl.in
> @@ -3,7 +3,7 @@
>  ## depends on ! WINDOWS && ! BARE_METAL
>  ##
>  ## select LIBC_SUPPORT_THREADS_NATIVE
> -## select CC_CORE_PASSES_NEEDED
> +## select CC_CORE_PASS_2_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
> diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh
> index 7172cf2..f997d25 100644
> --- a/scripts/build/libc/musl.sh
> +++ b/scripts/build/libc/musl.sh
> @@ -48,7 +48,7 @@ do_libc_configure() {
>      # NOTE: musl handles the build/host/target a little bit differently
>      # then one would expect:
>      #   build   : not used
> -    #   host    : the machine building musl
> +    #   host    : the machine musl runs on
>      #   target  : the machine musl runs on
>      CT_DoExecLog CFG                \
>      CFLAGS="${extra_cflags[@]}"     \
> @@ -73,13 +73,6 @@ do_libc_start_files() {
>
>      CT_DoLog EXTRA "Installing headers"
>      CT_DoExecLog ALL make DESTDIR="${CT_SYSROOT_DIR}" install-headers
> -
> -    CT_DoExecLog ALL make DESTDIR="${CT_SYSROOT_DIR}" \
> -        crt/crt1.o crt/crti.o crt/crtn.o
> -    CT_DoExecLog ALL cp -av crt/crt*.o "${CT_SYSROOT_DIR}/usr/lib"
> -    CT_DoExecLog ALL ${CT_TARGET}-gcc -nostdlib \
> -        -nostartfiles -shared -x c /dev/null -o "${CT_SYSROOT_DIR}/usr/lib/libc.so"
> -    CT_EndStep
>  }
>
>  do_libc() {
> --
> 2.1.0
>

This patch still has issues.

===========================================
x86_64test/.build/x86_64-unknown-linux-musl/build/build-libc-headers/tools/install.sh'
[ALL  ]    '/home/bryan/build/tcwork/x86_64test/.build/src/musl-1.1.4/tools/mkalltypes.sed'
-> '/home/bryan/build/tcwork/x86_64test/.build/x86_64-unknown-linux-musl/build/build-libc-headers/tools/mkalltypes.sed'
[ALL  ]    '/home/bryan/build/tcwork/x86_64test/.build/src/musl-1.1.4/tools/musl-gcc.specs.sh'
-> '/home/bryan/build/tcwork/x86_64test/.build/x86_64-unknown-linux-musl/build/build-libc-headers/tools/musl-gcc.specs.sh'
[ALL  ]    '/home/bryan/build/tcwork/x86_64test/.build/src/musl-1.1.4/tools/version.sh'
-> '/home/bryan/build/tcwork/x86_64test/.build/x86_64-unknown-linux-musl/build/build-libc-headers/tools/version.sh'
[EXTRA]    Configuring C library
[DEBUG]    ==> Executing: 'CFLAGS=-fno-toplevel-reorder'
'CROSS_COMPILE=x86_64-unknown-linux-musl-' './configure'
'--host=x86_64-unknown-linux-musl'
'--target=x86_64-unknown-linux-musl' '--prefix=/usr'
'--disable-gcc-wrapper' '--enable-optimize=auto'
[CFG  ]    checking for C compiler...
[CFG  ]    ./configure: cannot find a C compiler
[ERROR]
[ERROR]  >>
[ERROR]  >>  Build failed in step 'Installing C library headers'
[ERROR]  >>        called in step '(top-level)'
[ERROR]  >>
[ERROR]  >>  Error happened in: CT_DoExecLog[scripts/functions@257]
[ERROR]  >>        called from: do_libc_configure[scripts/build/libc/musl.sh@64]
[ERROR]  >>        called from:
do_libc_start_files[scripts/build/libc/musl.sh@84]
[ERROR]  >>        called from: main[scripts/crosstool-NG.sh@638]
[ERROR]  >>
[ERROR]  >>  For more info on this error, look at the file: 'build.log'
[ERROR]  >>  There is a list of known issues, some with workarounds, in:
[ERROR]  >>
'/home/bryan/ctng/share/doc/crosstool-ng/ct-ng.git+fdbd74b/B - Known
issues.txt'
[ERROR]
[ERROR]  (elapsed: 4:12.20)
===========================================

I believe the issue has to do with setting CROSS_COMPILE during the
`make install-headers' step, as the cross compiler doesn't exist yet.

-Bryan

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH v3 0/5] Add musl-libc options
  2014-09-05  6:34 [PATCH v3 0/5] Add musl-libc options Bryan Hundven
                   ` (4 preceding siblings ...)
  2014-09-05  6:34 ` [PATCH 2/5] libc/musl: Add options for optimization Bryan Hundven
@ 2014-09-11 21:28 ` Yann E. MORIN
  5 siblings, 0 replies; 9+ messages in thread
From: Yann E. MORIN @ 2014-09-11 21:28 UTC (permalink / raw)
  To: Bryan Hundven; +Cc: crossgcc

Bryan, All,

On 2014-09-04 23:33 -0700, Bryan Hundven spake thusly:
> Many typos and fixes to suggestions made by y_morin and sh4rm4 in
> #crosstool-ng, here is v3. Enjoy!

Patchs 2 to 5 applied; patch 1 left out since you said you still had
issues with it.

Thanks!

Regards,
Yann E. MORIN.

-- 
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|  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.  |
'------------------------------^-------^------------------^--------------------'

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH 4/5] libc/musl: Add config option for extra developer warnings
  2014-09-04 20:57 [PATCH 1/5] libc/musl: Remove gcc core pass-1 from musl-libc build Bryan Hundven
@ 2014-09-04 20:57 ` Bryan Hundven
  0 siblings, 0 replies; 9+ messages in thread
From: Bryan Hundven @ 2014-09-04 20:57 UTC (permalink / raw)
  To: Yann E. MORIN; +Cc: crossgcc, Bryan Hundven

This commit adds a configuration knob for enabling extra developer
warnings to be enabled during the musl-libc build.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
---
 config/libc/musl.in.2      | 6 ++++++
 scripts/build/libc/musl.sh | 4 ++++
 2 files changed, 10 insertions(+)

diff --git a/config/libc/musl.in.2 b/config/libc/musl.in.2
index 543cac3..bfdbae9 100644
--- a/config/libc/musl.in.2
+++ b/config/libc/musl.in.2
@@ -7,6 +7,12 @@ config LIBC_MUSL_DEBUG
       This option enables debugging information, this will increase the size of
       the resulting library.
 
+config LIBC_MUSL_WARNINGS
+    bool
+    prompt "Build with recommended warnings flags"
+    help
+      Build musl-libc with extra warnings, useful for musl-libc development.
+
 choice
     prompt "How to optimize musl-libc"
     default LIBC_MUSL_OPTIMIZE_AUTO
diff --git a/scripts/build/libc/musl.sh b/scripts/build/libc/musl.sh
index f2d005e..622380e 100644
--- a/scripts/build/libc/musl.sh
+++ b/scripts/build/libc/musl.sh
@@ -50,6 +50,10 @@ do_libc_configure() {
         extra_conf+=("--enable-debug")
     fi
 
+    if [ "${CT_LIBC_MUSL_WARNINGS}" = "y" ]; then
+        extra_conf+=("--enable-warnings")
+    fi
+
     if [ "${CT_LIBC_MUSL_OPTIMIZE_NONE}" = "y" ]; then
         extra_conf+=("--optimize=no")
     elif [ "${CT_LIBC_MUSL_OPTIMIZE_AUTO}" = "y" ]; then
-- 
2.1.0


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^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2014-09-11 21:28 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
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2014-09-05  6:34 [PATCH v3 0/5] Add musl-libc options Bryan Hundven
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2014-09-05  6:34 ` [PATCH 4/5] libc/musl: Add config option for extra developer warnings Bryan Hundven
2014-09-05  6:34 ` [PATCH 5/5] config/gcc: Disable CC_GCC_LIBSANITIZER for musl-libc Bryan Hundven
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2014-09-05  7:01   ` Bryan Hundven
2014-09-05  6:34 ` [PATCH 2/5] libc/musl: Add options for optimization Bryan Hundven
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This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).