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Re: Differences between C++ 'new' operator and 'malloc()' (NOT a C/C++ question)
- From: "Claude SIMON" <simon dot claude at zeusw dot org>
- To: cygwin at cygwin dot com
- Date: Wed, 18 Jul 2012 10:42:19 +0200
- Subject: Re: Differences between C++ 'new' operator and 'malloc()' (NOT a C/C++ question)
- References: <firstname.lastname@example.org>
- Reply-to: simon dot claude at zeusw dot org
Ryan Johnson wrote:
> On 13/07/2012 4:25 AM, Al Slater wrote:
>> On 12/07/2012 16:59, Claude SIMON wrote:
>>> Ryan Johnson wrote:
>>>> Sorry, I should have actually looked at the repo before assuming the
>>>> test case was a monstrosity. By way of penance, I've now looked,
>>>> downloaded, tweaked, and tested it.
>>> Thanks for testing.
>>> I removed your test results (and the other stuff) from this message,
>>> because I'm not interested into, but because I have a new problem,
>>> prevents me to investigate further the original problem in the light of
>>> your test results.
>>> Since my last testings, I updated Cygwin, the JDK and the JRE. So, my
>>> current configuration is now :
>>> Windows Vista 32 bits SP2
>>> Cygwin 1.7.15
>>> g++ 4.5.3
>>> javac 1.7.0_05
>>> javah 1.7.0_05
>>> java 1.7.0_05
>>> When running the test case, I now have :
>>> $ java jcmc
>>> Loading library 'jcmc'...Exception in thread "main"
>>> java.lang.UnsatisfiedLinkError: H:\cvs\epeios\bugs\jcmc\jcmc.dll:
>>> Ã? cet emplacement de la mÃ?moire n'est pas valide
>>> at java.lang.ClassLoader$NativeLibrary.load(Native Method)
>>> at java.lang.ClassLoader.loadLibrary1(Unknown Source)
>>> at java.lang.ClassLoader.loadLibrary0(Unknown Source)
>>> at java.lang.ClassLoader.loadLibrary(Unknown Source)
>>> at java.lang.Runtime.loadLibrary0(Unknown Source)
>>> at java.lang.System.loadLibrary(Unknown Source)
>>> at jcmc.main(jcmc.java:9)
>>> There is a French message which roughly means "The access to this
>>> location is not valid"
>>> I updated the test case to reflect your changes :
>>> - 'Makefile' now generates the '.h' file,
>>> - 'Makefile' does no more contain the '--stdcall-alias' linker
>>> - the '.cpp' contains now the `extern "C"' directive,
>>> - the '.h' is removed from test case, since it's now generated by
>>> I have the new error message with this modified test case, but also
>>> the original one. I suspect that the French error message is issued by
>>> Cygwin or by one of its sub-component, since the JVM never issued a
>>> message which wasn't in English, but Cygwin did.
>>> So, I have to postpone the study of the 'malloc()' related bug until I
>>> manage to resolve this new issue ; I then come back to your test
>>> But, meanwhile, if someone has an idea why I have this new error...
>>> Here again the address where the test case can be found :
>> provide any help?
> Or, just use mingw-gcc, like I suggested before:
>> x86_64-w64-mingw32-g++ -static-libgcc -static-libstdc++ -c -g
>> -Ijdk/include -Ijdk/include/win32 "-D__int64=long long" jcmc.cpp
>> Mingw is a windows-targeted cross compiler that runs under cygwin but
>> produces native windows binaries, so it doesn't have any posix
>> functions available; the -static flags tell mingw to make a truly
>> stand-alone executable that has only standard windows runtime
> Just use i686-pc-mingw32-g++ if you're 32-bit, the rest stays the same.
Thanks! This is what I finally, and successfully, did. I updated the test
However, I would like to use the Cygwin 'default' compiler, because this
one is used more often as the 'MinGW' one and especially because I had to
do some tweaks. I had to install the 'libcgj11' package (not a big deal),
but also :
- to copy '/usr/i686-pc-mingw32/sys-root/mingw/bin/libgcc_s_dw2-1.dll' in
- in '/bin', to make a copy of 'cyggcj-11.dll' and name it 'libgcj-11.dll'.
Quite awful, isnt't it ? But without that, I didn't manage to make my
component to be loaded.
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