Re: How are we supposed to build Libc?

Subject: Re: How are we supposed to build Libc?
From: evan schoffstall <email@hidden>
Date: Fri, 30 Sep 2016 08:26:30 -0400

For some reason, it looks like you're missing this file:

http://opensource.apple.com/source/libpthread/libpthread-105.1.4/sys/_pthread/_pthread_types.h

"curl" it & throw that where ever it needs to go (sorry, it's been a long time since I've built a core project)

If it finds that file successfully, but throws another error, I would recommend reinstalling some core developer packages. Which one I'm not sure of right off the bat.

Let us know how that goes.

On Fri, Sep 30, 2016 at 6:37 AM, Stéphane Sudre <email@hidden> wrote:

On 29 sept. 2016, at 21:07, Jeremy Huddleston Sequoia wrote:

> What are your arguments to xcodebuild?

None. I open the Xcode project in Xcode and click the Run (Play) button. That seems to be a way which should work. Otherwise, I'm not sure why there's a Xcode project file.

target is libsystem_c.dylic.

I've tried other targets without any success.

> What is the build failure you are encountering?

Depending on the Xcode version (4.6.x or 8.0, there between 120 and 260 reported errors).

> Can you provide a build log?

Most of the errors are related to files not found in <sys/_something>. This "_" prefix is a bit weird for me.

CompileC /Users/stephane/Library/Developer/Xcode/DerivedData/Libc-gzfwjliepgsrgedfufksqhwlcvim/Build/Intermediates/Libc.build/Debug/Base.build/Objects-normal/x86_64/sigaltstk.o compat-43/sigaltstk.c normal x86_64 c com.apple.compilers.llvm.clang.1_0.compiler
cd /Users/stephane/Downloads/Libc-1082.50.1
setenv LANG en_US.US-ASCII
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -x c -arch x86_64 -fmessage-length=0 -std=gnu99 -Wno-trigraphs -fpascal-strings -Os -Werror-implicit-function-declaration -Wno-missing-field-initializers -Wno-missing-prototypes -Wreturn-type -Wformat -Wno-missing-braces -Wparentheses -Wswitch -Wno-unused-function -Wno-unused-label -Wno-unused-parameter -Wunused-variable -Wunused-value -Wno-empty-body -Wuninitialized -Wno-unknown-pragmas -Wno-shadow -Wno-four-char-constants -Wno-conversion -Wno-constant-conversion -Wno-int-conversion -Wno-enum-conversion -Wno-shorten-64-to-32 -Wpointer-sign -Wno-newline-eof -D__LIBC__ -D__DARWIN_UNIX03=1 -D__DARWIN_64_BIT_INO_T=1 -D__DARWIN_NON_CANCELABLE=1 -D__DARWIN_VERS_1050=1 -D_FORTIFY_SOURCE=0 -fasm-blocks -fstrict-aliasing -Wdeprecated-declarations -g -Wno-sign-conversion -I/Users/stephane/Library/Developer/Xcode/DerivedData/Libc-gzfwjliepgsrgedfufksqhwlcvim/Build/Products/Debug/include -I/Users/stephane/Library/Developer/Xcode/DerivedData/Libc-gzfwjliepgsrgedfufksqhwlcvim/Build/Intermediates/Libc.build/Debug/Base.build/DerivedSources/dtrace -I/Users/stephane/Downloads/Libc-1082.50.1 -I/Users/stephane/Downloads/Libc-1082.50.1/include -I/Users/stephane/Downloads/Libc-1082.50.1/gen -I/Users/stephane/Downloads/Libc-1082.50.1/locale -I/Users/stephane/Downloads/Libc-1082.50.1/locale/FreeBSD -I/Users/stephane/Downloads/Libc-1082.50.1/stdtime/FreeBSD -I/Users/stephane/Downloads/Libc-1082.50.1/darwin -I/System/Library/Frameworks/System.framework/PrivateHeaders -I/usr/local/include -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -I/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include -I/Users/stephane/Library/Developer/Xcode/DerivedData/Libc-gzfwjliepgsrgedfufksqhwlcvim/Build/Intermediates/Libc.build/Debug/Base.build/DerivedSources/x86_64 -I/Users/stephane/Library/Developer/Xcode/DerivedData/Libc-gzfwjliepgsrgedfufksqhwlcvim/Build/Intermediates/Libc.build/Debug/Base.build/DerivedSources -Wall -F/Users/stephane/Library/Developer/Xcode/DerivedData/Libc-gzfwjliepgsrgedfufksqhwlcvim/Build/Products/Debug -fdollars-in-identifiers -fno-common -fverbose-asm -MMD -MT dependencies -MF /Users/stephane/Library/Developer/Xcode/DerivedData/Libc-gzfwjliepgsrgedfufksqhwlcvim/Build/Intermediates/Libc.build/Debug/Base.build/Objects-normal/x86_64/sigaltstk.d --serialize-diagnostics /Users/stephane/Library/Developer/Xcode/DerivedData/Libc-gzfwjliepgsrgedfufksqhwlcvim/Build/Intermediates/Libc.build/Debug/Base.build/Objects-normal/x86_64/sigaltstk.dia -c /Users/stephane/Downloads/Libc-1082.50.1/compat-43/sigaltstk.c -o /Users/stephane/Library/Developer/Xcode/DerivedData/Libc-gzfwjliepgsrgedfufksqhwlcvim/Build/Intermediates/Libc.build/Debug/Base.build/Objects-normal/x86_64/sigaltstk.o

In file included from /Users/stephane/Downloads/Libc-1082.50.1/compat-43/sigaltstk.c:23:
/Users/stephane/Downloads/Libc-1082.50.1/include/signal.h:65:10: fatal error: 'sys/_pthread/_pthread_types.h' file not found
#include <sys/_pthread/_pthread_types.h>
^
1 error generated.

> Regarding releases of newer versions, it usually takes a little while after GM for the OSS drop.

I don't think it's an issue here as the source code for the function I want to investigate has probably not changed in years.

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Thanks,

Evan

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References:
	>How are we supposed to build Libc? (From: Stéphane Sudre <email@hidden>)
	>Re: How are we supposed to build Libc? (From: Stéphane Sudre <email@hidden>)

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