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commented
9 years ago I tried to compile the wxwidgets code with pure gcc:
cd wxWidgets/
mkdir build-gcc
cd build-gcc
../configure
make -j30
cd samples/minimal/
make
./minimal
If I add my own implementation of strdup to samples/minimal/minimal.cpp it does
not get called!
diff --git a/samples/minimal/minimal.cpp b/samples/minimal/minimal.cpp
index a78e462..d4a2deb 100644
--- a/samples/minimal/minimal.cpp
+++ b/samples/minimal/minimal.cpp
@@ -198,3 +198,13 @@ void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
wxOK | wxICON_INFORMATION,
this);
}
+extern "C" {
+ char *strdup(const char *x) {
+ fprintf(stderr, "MyStrdup\n");
+ size_t len = strlen(x) + 1;
+ char *res = (char*)malloc(len);
+ memcpy(res, x, len);
+ return res;
+ }
+}
% nm ./minimal | grep strdup
0000000000409f20 T strdup
% gdb -q ./minimal
...
(gdb) b strdup
Breakpoint 1 at 0x409f20
(gdb) r
Starting program: /home/kcc/tmp/wxWidgets/build-gcc/samples/minimal/minimal
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/grte/v3/lib64/libthread_db.so.1".
Breakpoint 1, __GI___strdup (s=0x7ffff676eeea <_nl_C_name> "C") at strdup.c:41
41 strdup.c: No such file or directory.
(gdb) bt
#0 __GI___strdup (s=0x7ffff676eeea <_nl_C_name> "C") at strdup.c:41
#1 0x00007ffff71e98d3 in wxLocale::GetSystemEncodingName() () from
/home/kcc/tmp/wxWidgets/build-gcc/lib/libwx_baseu-2.9.so.5
#2 0x00007ffff71e9aed in wxLocale::GetSystemEncoding() () from
/home/kcc/tmp/wxWidgets/build-gcc/lib/libwx_baseu-2.9.so.5
#3 0x00007ffff72118a2 in wxCSConv::SetEncoding(wxFontEncoding) () from
/home/kcc/tmp/wxWidgets/build-gcc/lib/libwx_baseu-2.9.so.5
#4 0x00007ffff721854b in wxCSConv::wxCSConv(wxFontEncoding) () from
/home/kcc/tmp/wxWidgets/build-gcc/lib/libwx_baseu-2.9.so.5
#5 0x00007ffff7218841 in wxGet_wxConvLocalPtr() () from
/home/kcc/tmp/wxWidgets/build-gcc/lib/libwx_baseu-2.9.so.5
#6 0x00007ffff7153c02 in _GLOBAL__sub_I_strconv.cpp () from
/home/kcc/tmp/wxWidgets/build-gcc/lib/libwx_baseu-2.9.so.5
#7 0x00007ffff7de9306 in call_init (l=<optimized out>, argc=1,
argv=0x7fffffffe288, env=0x7fffffffe298) at dl-init.c:85
#8 0x00007ffff7de93df in call_init (env=<optimized out>, argv=<optimized out>,
argc=<optimized out>, l=<optimized out>) at dl-init.c:52
#9 _dl_init (main_map=0x7ffff7ffe2c8, argc=1, argv=0x7fffffffe288,
env=0x7fffffffe298) at dl-init.c:134
#10 0x00007ffff7ddb6ea in _dl_start_user () from /lib64/ld-linux-x86-64.so.2
#11 0x0000000000000001 in ?? ()
#12 0x00007fffffffe548 in ?? ()
#13 0x0000000000000000 in ?? ()
Original comment by konstant...@gmail.com on 5 Feb 2013 at 10:14
Original issue reported on code.google.com by
konstant...@gmail.comon 5 Feb 2013 at 9:34