Cross compile issue with OpenJDK 8

[yuyinyang]

I am working on a linux x86_64 machine, and trying to cross compile
OpenJDK 8 for the Intel Xeon Phi coprocessor. The cross compiler
toolchain for Xeon Phi is in /usr/linux-k1om-4.7/bin, which contains
x86_64-k1om-linux-gcc, x86_64-k1om-linux-g++, etc.

I'm using code cloned from Mercurial repository, tip at 5eb3c1dc348f.
I ran the configure script as follows:

    ./configure --openjdk-target=x86_64-k1om-linux

Is this the correct way to cross compile OpenJDK8?

Currently I encountered a problem that the x86_64-k1om-linux-gcc seems
not correctly resolved, while the other compiler tools like ar, nm are
correctly resolved.

Here's the problematic log lines, it's trying to find
"x86_64-k1om-linux-/usr/bin/gcc" instead of "x86_64-k1om-linux-gcc":

    configure: Using gcc (GCC) 4.4.7 20120313 (Red Hat-3) C compiler
version 4.4.7-3) (located at /usr/bin/gcc)
    checking for x86_64-k1om-linux-/usr/bin/gcc... /usr/bin/gcc

For tools like ar, the log lines are:

    checking for x86_64-k1om-linux-ar... x86_64-k1om-linux-ar
    configure: Rewriting AR to "/usr/linux-k1om-4.7/bin/x86_64-k1om-linux-ar"

Below is an excerpt of the configure log which I think is related to the issue.

...
checking for javah in Boot JDK... ok
checking for javap in Boot JDK... ok
checking for jar in Boot JDK... ok
checking for rmic in Boot JDK... ok
checking for native2ascii in Boot JDK... ok
checking for jtreg... no
checking for cl... no
checking for cc... /usr/bin/cc
configure: Resolving BUILD_CC (as /usr/bin/cc) failed, using
/usr/bin/cc directly.
checking for cl... no
checking for CC... no
checking for g++... /usr/bin/g++
configure: Resolving BUILD_CXX (as /usr/bin/g++) failed, using
/usr/bin/g++ directly.
checking for ld... /usr/bin/ld
configure: Resolving BUILD_LD (as /usr/bin/ld) failed, using
/usr/bin/ld directly.
checking for gcc... /usr/bin/gcc
configure: Resolving CC (as /usr/bin/gcc) failed, using /usr/bin/gcc directly.
checking resolved symbolic links for CC... /usr/bin/gcc
checking if CC is disguised ccache... no, keeping CC
configure: Using gcc (GCC) 4.4.7 20120313 (Red Hat-3) C compiler
version 4.4.7-3) (located at /usr/bin/gcc)
checking for x86_64-k1om-linux-/usr/bin/gcc... /usr/bin/gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... yes
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether /usr/bin/gcc accepts -g... yes
checking for /usr/bin/gcc option to accept ISO C89... none needed
checking for g++... /usr/bin/g++
configure: Resolving CXX (as /usr/bin/g++) failed, using /usr/bin/g++ directly.
checking resolved symbolic links for CXX... /usr/bin/g++
checking if CXX is disguised ccache... no, keeping CXX
configure: Using g++ (GCC) 4.4.7 20120313 (Red Hat-3) C++ compiler
version 4.4.7-3) (located at /usr/bin/g++)
checking whether we are using the GNU C++ compiler... yes
checking whether /usr/bin/g++ accepts -g... yes
checking for x86_64-k1om-linux-ar... x86_64-k1om-linux-ar
configure: Rewriting AR to "/usr/linux-k1om-4.7/bin/x86_64-k1om-linux-ar"
checking how to run the C preprocessor... /usr/bin/gcc -E
configure: Resolving CPP (as /usr/bin/gcc) failed, using /usr/bin/gcc directly.
checking how to run the C++ preprocessor... /usr/bin/g++ -E
configure: Resolving CXXCPP (as /usr/bin/g++) failed, using
/usr/bin/g++ directly.
checking for x86_64-k1om-linux-nm... x86_64-k1om-linux-nm
configure: Rewriting NM to "/usr/linux-k1om-4.7/bin/x86_64-k1om-linux-nm"
checking for x86_64-k1om-linux-strip... x86_64-k1om-linux-strip
configure: Rewriting STRIP to "/usr/linux-k1om-4.7/bin/x86_64-k1om-linux-strip"
checking for x86_64-k1om-linux-gobjcopy... no
checking for x86_64-k1om-linux-objcopy... x86_64-k1om-linux-objcopy
configure: Rewriting OBJCOPY to
"/usr/linux-k1om-4.7/bin/x86_64-k1om-linux-objcopy"
...

-- 

Jacob