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From "Chunrong Lai (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HARMONY-5914) Can't build with gcc >= 4.2: LinuxNativeFont.c:251: warning: cast from pointer to integer of different size
Date Wed, 30 Jul 2008 10:57:32 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-5914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Chunrong Lai updated HARMONY-5914:
----------------------------------

    Attachment: More64bits.warnings.txt


  More data convertion related issues are observed as the attachment. I wonder if they will
potentially break some future compiler if the warning level is high.
 Below are some examples:

     [java]      [exec] win_printer_factory.c(86) : warning C4312: 'type cast' :
 conversion from 'unsigned long' to 'HANDLE' of greater size
     [java]      [exec] devmode_struct_wrapper.c(149) : warning C4312: 'type cas
t' : conversion from 'unsigned long' to 'DEVMODEW *' of greater size
     [java]        [cc] C:\pt-hdk\chunrong.release.680641.1\working_vm\vm\thread
\src\thread_native_state.c(38) : warning C4244: 'return' : conversion from 'IDAT
A' to 'int', possible loss of data
     [java] [compile-cc] C:\pt-hdk\chunrong.release.680641.1\working_vm\vm\vmcor
e\src\ncai\ncai_registers.cpp(28) : warning C4267: '=' : conversion from 'size_t
' to 'jint', possible loss of data
     [java] [compile-cc] C:\pt-hdk\chunrong.release.680641.1\working_vm\vm\jitri
no\src\vm\VMInterface.cpp(717) : warning C4267: 'return' : conversion from 'size
_t' to 'U_32', possible loss of data
     [java] [compile-cc] c:\pt-hdk\chunrong.release.680641.1\working_vm\vm\gc_ge
n\src\mark_sweep\wspace_chunk.h(158) : warning C4244: 'argument' : conversion from 'uint64'
to 'int', possible loss of data
     [java] [compile-cc] C:\pt-hdk\chunrong.release.680641.1\working_vm\vm\gc_ge
n\src\los\lspace_alloc_collect.cpp(412) : warning C4244: 'argument' : conversion
 from 'uint64' to 'unsigned int', possible loss of data


> Can't build with gcc >= 4.2: LinuxNativeFont.c:251: warning: cast from pointer to
integer of different size
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-5914
>                 URL: https://issues.apache.org/jira/browse/HARMONY-5914
>             Project: Harmony
>          Issue Type: Bug
>          Components: Classlib
>         Environment: Ubuntu 8.04, drlvm svn head.
>            Reporter: Steve Blackburn
>            Assignee: Chunrong Lai
>         Attachments: H5914.64bitswarnings.patch, H5914.classlib.patch, H5914.fixed-more-warnings.patch,
More64bits.warnings.txt
>
>
> We run nightly regressions of various VMs against the dacapo suite (building from svn
nightly).  I was trying to get things working on an upgraded box.  When I tried to build drlvm,
I found that it would not compile with gcc-4.2.3.   The work-around is either to use an older
gcc, or to turn of -Werror; neither are ideal.  Or should I be doing something different with
my build? (I just followed the standard instructions for a federated build).
> The code generating the warnings looks questionable, so probably the right solution (in
this first instance) is to fix the code.
> # my gcc
> working_classlib/modules/awt/src/main/native/linuxfont/unix$  gcc -v
> Using built-in specs.
> Target: i486-linux-gnu
> Configured with: ../src/configure -v --enable-languages=c,c++,fortran,objc,obj-c++,treelang
--prefix=/usr --enable-shared --with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix --enable-nls --with-gxx-include-dir=/usr/include/c++/4.2 --program-suffix=-4.2
--enable-clocale=gnu --enable-libstdcxx-debug --enable-objc-gc --enable-mpfr --enable-targets=all
--enable-checking=release --build=i486-linux-gnu --host=i486-linux-gnu --target=i486-linux-gnu
> Thread model: posix
> gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu7)
> # builds fine with gcc-3.3
> working_classlib/modules/awt/src/main/native/linuxfont/unix$ gcc-3.3 -DLINUX -DLINUX_X86
-DHYX86 -DIPv6_FUNCTION_SUPPORT -D_REENTRANT -I/home/dacapo/regression/vms/scm/drlvm-svn/working_classlib/deploy/include
-I/home/dacapo/regression/vms/scm/drlvm-svn/working_classlib/deploy/jdk/include -I. -I../shared/
-Icommon -I/usr/X11R6/include -I/usr/include/freetype2 -Iinclude -I../../fontlib/unix -I../../fontlib/shared
 -fpic -march=pentium3 -ggdb -O0  -Werror   -c -o LinuxNativeFont.o LinuxNativeFont.c
> # builds fine with gcc-4.1
> gcc-4.1 -DLINUX -DLINUX_X86 -DHYX86 -DIPv6_FUNCTION_SUPPORT -D_REENTRANT -I/home/dacapo/regression/vms/scm/drlvm-svn/working_classlib/deploy/include
-I/home/dacapo/regression/vms/scm/drlvm-svn/working_classlib/deploy/jdk/include -I. -I../shared/
-Icommon -I/usr/X11R6/include -I/usr/include/freetype2 -Iinclude -I../../fontlib/unix -I../../fontlib/shared
 -fpic -march=pentium3 -ggdb -O0  -Werror   -c -o LinuxNativeFont.o LinuxNativeFont.c
> # dies with gcc-4.2.3
> gcc-4.2 -DLINUX -DLINUX_X86 -DHYX86 -DIPv6_FUNCTION_SUPPORT -D_REENTRANT -I/home/dacapo/regression/vms/scm/drlvm-svn/working_classlib/deploy/include
-I/home/dacapo/regression/vms/scm/drlvm-svn/working_classlib/deploy/jdk/include -I. -I../shared/
-Icommon -I/usr/X11R6/include -I/usr/include/freetype2 -Iinclude -I../../fontlib/unix -I../../fontlib/shared
 -fpic -march=pentium3 -ggdb -O0  -Werror   -c -o LinuxNativeFont.o LinuxNativeFont.c
> cc1: warnings being treated as errors
> LinuxNativeFont.c: In function 'Java_org_apache_harmony_awt_gl_font_LinuxNativeFont_initializeFont':
> LinuxNativeFont.c:251: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:257: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:284: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:417: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:429: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:440: warning: cast from pointer to integer of different size
> LinuxNativeFont.c: In function 'Java_org_apache_harmony_awt_gl_font_LinuxNativeFont_initializeFontFromFP':
> LinuxNativeFont.c:487: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:493: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:508: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:520: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:592: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:604: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:615: warning: cast from pointer to integer of different size
> LinuxNativeFont.c: In function 'Java_org_apache_harmony_awt_gl_font_LinuxNativeFont_getFonts':
> LinuxNativeFont.c:969: warning: cast from pointer to integer of different size
> LinuxNativeFont.c: In function 'Java_org_apache_harmony_awt_gl_font_LinuxNativeFont_NativeInitGlyphBitmap':
> LinuxNativeFont.c:1390: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:1399: warning: cast from pointer to integer of different size
> LinuxNativeFont.c:1409: warning: cast from pointer to integer of different size
> LinuxNativeFont.c: In function 'Java_org_apache_harmony_awt_gl_font_LinuxNativeFont_getGlyphOutline':
> LinuxNativeFont.c:1636: warning: cast from pointer to integer of different size
> # dies with gcc 4.3.2
> $ gcc-4.3 -DLINUX -DLINUX_X86 -DHYX86 -DIPv6_FUNCTION_SUPPORT -D_REENTRANT -I/home/dacapo/regression/vms/scm/drlvm-svn/working_classlib/deploy/include
-I/home/dacapo/regression/vms/scm/drlvm-svn/working_classlib/deploy/jdk/include -I. -I../shared/
-Icommon -I/usr/X11R6/include -I/usr/include/freetype2 -Iinclude -I../../fontlib/unix -I../../fontlib/shared
 -fpic -march=pentium3 -ggdb -O0  -Werror   -c -o LinuxNativeFont.o LinuxNativeFont.c
> cc1: warnings being treated as errors
> LinuxNativeFont.c: In function 'Java_org_apache_harmony_awt_gl_font_LinuxNativeFont_initializeFont':
> LinuxNativeFont.c:251: error: cast from pointer to integer of different size
> LinuxNativeFont.c:257: error: cast from pointer to integer of different size
> LinuxNativeFont.c:284: error: cast from pointer to integer of different size
> LinuxNativeFont.c:417: error: cast from pointer to integer of different size
> LinuxNativeFont.c:429: error: cast from pointer to integer of different size
> LinuxNativeFont.c:440: error: cast from pointer to integer of different size
> LinuxNativeFont.c: In function 'Java_org_apache_harmony_awt_gl_font_LinuxNativeFont_initializeFontFromFP':
> LinuxNativeFont.c:487: error: cast from pointer to integer of different size
> LinuxNativeFont.c:493: error: cast from pointer to integer of different size
> LinuxNativeFont.c:508: error: cast from pointer to integer of different size
> LinuxNativeFont.c:520: error: cast from pointer to integer of different size
> LinuxNativeFont.c:592: error: cast from pointer to integer of different size
> LinuxNativeFont.c:604: error: cast from pointer to integer of different size
> LinuxNativeFont.c:615: error: cast from pointer to integer of different size
> LinuxNativeFont.c: In function 'Java_org_apache_harmony_awt_gl_font_LinuxNativeFont_getFonts':
> LinuxNativeFont.c:969: error: cast from pointer to integer of different size
> LinuxNativeFont.c: In function 'Java_org_apache_harmony_awt_gl_font_LinuxNativeFont_NativeInitGlyphBitmap':
> LinuxNativeFont.c:1390: error: cast from pointer to integer of different size
> LinuxNativeFont.c:1399: error: cast from pointer to integer of different size
> LinuxNativeFont.c:1409: error: cast from pointer to integer of different size
> LinuxNativeFont.c: In function 'Java_org_apache_harmony_awt_gl_font_LinuxNativeFont_getGlyphOutline':
> LinuxNativeFont.c:1636: error: cast from pointer to integer of different size

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