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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang's gcc-toolchain flag seems not working"
href="https://llvm.org/bugs/show_bug.cgi?id=31264">31264</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang's gcc-toolchain flag seems not working
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.8
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</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>Driver
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>taenaru@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=17709" name="attach_17709" title="Hello World application build with clang --gnu-toolchain=$(TOOLCHAIN_PATH)">attachment 17709</a> <a href="attachment.cgi?id=17709&action=edit" title="Hello World application build with clang --gnu-toolchain=$(TOOLCHAIN_PATH)">[details]</a></span>
Hello World application build with clang --gnu-toolchain=$(TOOLCHAIN_PATH)
Hello,
I have met an issue with the "--gcc-toolchain" flag. As I understand that
option , it is intended to be used when we want to point out to clang where
necessary external GCC utilities are (like linker, assembler stuff, etc.).
I tried to use ARM GCC toolchain with clang, but it seemed that
"--gcc-toolchain" worked only during compilation. There is the output below:
System info:
OS: Linux ubuntu 4.8.0-27-generic #29-Ubuntu SMP Thu Oct 20 21:03:13 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux
Clang: clang version 3.8.1-12ubuntu1 (tags/RELEASE_381/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/bin
ARM GCC: arm-linux-gnueabihf-gcc (Linaro GCC 6.1-2016.08) 6.1.1 20160711
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
GCC toolchain used:
<a href="https://releases.linaro.org/components/toolchain/binaries/latest/arm-linux-gnueabihf/gcc-linaro-6.1.1-2016.08-x86_64_arm-linux-gnueabihf.tar.xz">https://releases.linaro.org/components/toolchain/binaries/latest/arm-linux-gnueabihf/gcc-linaro-6.1.1-2016.08-x86_64_arm-linux-gnueabihf.tar.xz</a>
# TOOLCHAIN_PATH = /home/vpetrigo/gcc-x86_64-arm-linux-gnueabihf
#
# content of the gcc-x86_64-arm-linux-gnueabihf folder:
# arm-linux-gnueabihf/
# bin/
# include/
# lib/
# libexec/
# share/
Here I have a simple "Hello World" application:
# main.c content
#include <stdio.h>
int main() {
printf("Hello world\n");
return 0;
}
I tried to invoke the clang like this:
`clang -target arm-linux-gnueabihf
--sysroot=/home/vpetrigo/gcc-x86_64-arm-linux-gnueabihf/arm-linux-gnueabihf/libc
--gcc-toolchain=/home/vpetrigo/gcc-x86_64-arm-linux-gnueabihf main.c -o main
-v`
The output is inside the attachment (see output.log)
As you can see during the linkage state /usr/bin/ld was used. But I provide the
valid toolchain path and there is `arm-linux-gnueabihf-ld` executable inside
the bin/ subfolder.
If I make a symlink of `arm-linux-gnueabihf-ld` and put it into the /usr/bin
folder, building works fine then.
Could you tell me if I misunderstand that flag and all necessary GCC utils must
be in the /usr/bin folder?</pre>
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