#4818: [PATCH] OSX: undefined symbols; isysroot misconfiguration
---------------------------------+------------------------------------------
Reporter: altaic | Owner:
Type: bug | Status: new
Priority: normal | Component: Build System
Version: 7.1 | Keywords:
Testcase: | Blockedby:
Os: MacOS X | Blocking:
Architecture: Unknown/Multiple | Failure: Building GHC failed
---------------------------------+------------------------------------------
'''Machine:'''
{{{
Processor: 3.06 GHz Intel Core 2 Duo
Architecture: x86/x86_64
OS: Mac OS X 10.6.5
}}}
'''Bootstrap GHC Info:'''
{{{
$ghc --info
[("Project name","The Glorious Glasgow Haskell Compilation System")
,("Project version","7.0.0.20100924")
,("Booter version","6.12.3")
,("Stage","2")
,("Build platform","i386-apple-darwin")
,("Host platform","i386-apple-darwin")
,("Target platform","i386-apple-darwin")
,("Have interpreter","YES")
,("Object splitting","NO")
,("Have native code generator","YES")
,("Have llvm code generator","YES")
,("Use archives for ghci","True")
,("Support SMP","YES")
,("Unregisterised","NO")
,("Tables next to code","YES")
,("RTS ways","l debug thr thr_debug thr_l thr_p dyn debug_dyn thr_dyn
thr_debug_dyn")
,("Leading underscore","YES")
,("Debug on","False")
,("LibDir","/Library/Frameworks/GHC.framework/Versions/700/usr/lib/ghc-7.0.0.20100924")
,("Global Package
DB","/Library/Frameworks/GHC.framework/Versions/700/usr/lib/ghc-7.0.0.20100924/package.conf.d")
]
}}}
'''Note:''' Other configure options cause the error; the following just
happens to be the last one I used.
'''Configure Info:'''
{{{
$./configure --build=i386-apple-darwin --host=i386-apple-darwin
--target=x86_64-apple-darwin
...
Configure completed successfully.
Building GHC version : 7.1.20101203
Build platform : i386-apple-darwin
Host platform : i386-apple-darwin
Target platform : x86_64-apple-darwin
Bootstrapping using : /usr/bin/ghc
which is version : 7.0.0.20100924
Using GCC : /usr/bin/gcc
which is version : 4.2.1
ld : /usr/bin/ld
Happy : /usr/local/bin/happy (1.18.5)
Alex : /usr/local/bin/alex (2.3.3)
Python : /usr/bin/python
Perl : /usr/bin/perl
dblatex : /usr/local/bin/dblatex
xsltproc : /usr/bin/xsltproc
HsColour : /Users/x/.cabal/bin/HsColour
Building DocBook HTML documentation : YES
Building DocBook PS documentation : YES
Building DocBook PDF documentation : YES
}}}
'''Error:'''
{{{
"/usr/bin/ghc" -H32m -O -package-conf libraries/bootstrapping.conf
-i -iutils/unlit/. -iutils/unlit/dist/build
-iutils/unlit/dist/build/autogen -Iutils/unlit/dist/build
-Iutils/unlit/dist/build/autogen -no-user-package-conf -rtsopts
-c utils/unlit/unlit.c -o utils/unlit/dist/build/unlit.o
"inplace/bin/mkdirhier" utils/unlit/dist/build/tmp//.
"/usr/bin/gcc" -o utils/unlit/dist/build/tmp/unlit -march=i686 -m32
-isysroot /Developer/SDKs/MacOSX10.5.sdk -mmacosx-version-min=10.5 -fno-
stack-protector utils/unlit/dist/build/unlit.o
Undefined symbols:
"_fopen$UNIX2003", referenced from:
_main in unlit.o
_main in unlit.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
make[1]: *** [utils/unlit/dist/build/tmp/unlit] Error 1
make: *** [all] Error 2
}}}
'''Hypothesis:''' GCC tries to use a hardcoded `-isysroot` from the
following patch to compile `unlit`, which cannot be mixed with other
components which seem to be using the default SDK on my machine. Even when
I specify `--with-macosx-deployment-target=10.5` for configure, unlit
still fails. I'm thinking that the deployment target only affects stage 2
or something, so earlier stages are using a combination of the default SDK
(in my case, 10.6) and the hardcoded one (10.5). Here's the patch that
caused the problem:
{{{
[Tell gcc to support back to OS X 10.5
Ian Lynagh <[email protected]>**20101203201558
Ignore-this: f02d70e5b9cce50137981c6cb2b62a18
] hunk ./aclocal.m4 27
+ case $$1 in
+ i386-apple-darwin|x86_64-apple-darwin)
+ # We support back to OS X 10.5
+ $2="$$2 -isysroot /Developer/SDKs/MacOSX10.5.sdk -mmacosx-
version-min=10.5"
+ $3="$$3 -isysroot /Developer/SDKs/MacOSX10.5.sdk -mmacosx-
version-min=10.5"
+ ;;
+ esac
+
}}}
'''Temporary Workaround:''' Revert above patch and apply the following:
{{{
--- old-ghc/aclocal.m4 2010-12-05 14:29:54.000000000 -0500
+++ new-ghc/aclocal.m4 2010-12-05 14:29:54.000000000 -0500
@@ -24,6 +24,14 @@
;;
esac
+ case $$1 in
+ i386-apple-darwin|x86_64-apple-darwin)
+ # Only support OS X 10.5 and later
+ $2="$$2 -mmacosx-version-min=10.5"
+ $3="$$3 -mmacosx-version-min=10.5"
+ ;;
+ esac
+
# If gcc knows about the stack protector, turn it off.
# Otherwise the stack-smash handler gets triggered.
echo 'int main(void) {return 0;}' > conftest.c
}}}
'''Permanent Resolution:''' Instead of hardcoding `-isysroot` in
aclocal.m4 (`-mmacosx-version-min` is fine to hard-code, though), we
should have build, host, and target isysroots (or stage0, stage1, etc.
isysroots), which are detected/specified by the configure script. It's
possible that separate isysroots aren't necessary, however in any case,
all the components in a stage must use the same isysroot if they're to be
linked together.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4818>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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