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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Can't set entry point (OS X Mavericks)"
href="http://llvm.org/bugs/show_bug.cgi?id=20366">20366</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Can't set entry point (OS X Mavericks)
</td>
</tr>
<tr>
<th>Product</th>
<td>lld
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>MacOS X
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>matt.fichman@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>I have the following program:
#include <stdio.h>
int bob() {
printf("bob\n");
return 0;
}
int main() {
printf("main\n");
return 0;
}
On Linux, I can enable a custom entry point via:
gcc test.c -Wl,-e,bob
When I run the resulting program, I get:
./a.out
bob
On OS X (with clang/ldd), however, this doesn't work:
clang test.c -Wl,-e,bob
./a.out
main
I've also tried:
clang test.c -e bob -v
...with no luck. Anyway, here's the output with the -v option:
clang test.c -Wl,-e,bob -v
Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
Target: x86_64-apple-darwin13.3.0
Thread model: posix
"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"
-cc1 -triple x86_64-apple-macosx10.9.0 -emit-obj -mrelax-all -disable-free
-disable-llvm-verifier -main-file-name test.c -mrelocation-model pic -pic-level
2 -mdisable-fp-elim -masm-verbose -munwind-tables -target-cpu core2
-target-linker-version 236.3 -v -resource-dir
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/5.1
-fdebug-compilation-dir /Users/mfichman/jogo -ferror-limit 19 -fmessage-length
125 -stack-protector 1 -mstackrealign -fblocks -fobjc-runtime=macosx-10.9.0
-fencode-extended-block-signature -fdiagnostics-show-option -fcolor-diagnostics
-vectorize-slp -o
/var/folders/4z/q41by0256hjc7s6v8ljmfpw8lywh5g/T/test-9b80a6.o -x c test.c
clang -cc1 version 5.1 based upon LLVM 3.4svn default target
x86_64-apple-darwin13.3.0
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/5.1/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
/usr/include
/System/Library/Frameworks (framework directory)
/Library/Frameworks (framework directory)
End of search list.
"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld"
-demangle -dynamic -arch x86_64 -macosx_version_min 10.9.0 -e bob -o a.out
/var/folders/4z/q41by0256hjc7s6v8ljmfpw8lywh5g/T/test-9b80a6.o -lSystem
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/5.1/lib/darwin/libclang_rt.osx.a
You can see that clang is correctly passing -e to ld, so maybe this is a
problem with ld.</pre>
</div>
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