[SOLVED] FLTK fl_input problem

minux · 03-18-2016, 01:28 PM

Good morning, i have little problem this fltk code.
My goal is to create a small shell scripting with fltk(common dialog stuff)

this an example code

Code:

#include <FL/Fl.H>
#include <FL/Fl_File_Chooser.H> 
int main(){
  //fl_message("Test");
  const char *val=fl_input("Your input");
  return Fl::run();
}

I got segfault without the dummy fl_message for both winxp and linux(fltk 1.3)
My question is how to get rid this without a dummy?

Thanks

rtmistler · 03-18-2016, 01:45 PM

I've got 1.3.1 and your program works fine. No segfault.

minux · 03-18-2016, 01:58 PM

This is embarassing for me,sorry the windows is ok, i'll switch to tiny core again.

Code:

User@user-gfyvamjhfr ~
$ fltk-config --compile test.cpp
g++ -I/usr/local/include -mwindows -DWIN32 -DUSE_OPENGL32 -D_LARGEFILE_SOURCE -D
_LARGEFILE64_SOURCE -o 'test' 'test.cpp' -mwindows /usr/local/lib/libfltk.a -lol
e32 -luuid -lcomctl32

User@user-gfyvamjhfr ~
$ ./test

User@user-gfyvamjhfr ~
$

rtmistler · 03-18-2016, 02:09 PM

Well, I salute you using XP

Just ran into a very nasty W8 problem where my customer claims, "You can't just scoff that off! You HAVE to fix it!" Happily the boss said something profane back on the call, which settled the issue.

minux · 03-18-2016, 02:15 PM

I can't buy 10

@rtmistler is your compilation from win or linux ?
Still no luck from TC

Code:

tc@box:~$ cd /tmp
tc@box:/tmp$ fltk-config --compile test.cpp
g++ -march=i486 -mtune=i686 -Os -s -pipe -fno-exceptions -fno-rtti -ffunction-sections -fdata-sections -fvisibility-inlines-hidden -Wl,-O1 -Wl,-gc-sections -Wl,-as-needed -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -fvisibility-inlines-hidden -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_THREAD_SAFE -D_REENTRANT -o 'test' 'test.cpp' /usr/local/lib/libfltk.a -lXcursor -lXfixes -lXft -lfontconfig -lXinerama -lpthread -ldl -lm -lX11
tc@box:/tmp$ ./test
Segmentation fault
tc@box:/tmp$

rtmistler · 03-18-2016, 02:17 PM

Linux: Ubuntu

rtmistler · 03-18-2016, 02:22 PM

I'd recommend you run that in the debugger or add the GDB flag to the compile so you can review the core file, however I don't know how to use fltk-config to change your flags, or where you'd change them. I do see instructions as to how to use the native G++ compiler instead of fltk-config. I'd consider exploring that.

Nothing wrong with your code, IMHO though

Perhaps something wrong with your FLTK install?

minux · 03-18-2016, 04:20 PM

@rtmistler , you're right nothing wrong with my code
I just made 2 compilations for 1.3.1(i see from yours) and 1.3.3
My win version is 1.3.0

Code:

tc@box:~$ cd /tmp
tc@box:/tmp$ fltk-config --compile test.cpp
g++ -I/usr/local/include -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_THREAD_SAFE -D_REENTRANT -o 'test' 'test.cpp' /usr/local/lib/libfltk.a -lXext -lXinerama -lpthread -ldl -lm -lX11
tc@box:/tmp$ ./test
tc@box:/tmp$ fltk-config --version
1.3.1
tc@box:/tmp$ fltk-config --compile test.cpp
g++ -I/usr/local/include -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -D_THREAD_SAFE -D_REENTRANT -o 'test' 'test.cpp' /usr/local/lib/libfltk.a -lXcursor -lXfixes -lXext -lXinerama -lpthread -ldl -lm -lX11
tc@box:/tmp$ ./test
Segmentation fault
tc@box:/tmp$ fltk-config --version
1.3.3
tc@box:/tmp$

Got quick answer from Mr Ercolano

Quote:

I can confirm a crash with that code using 1.3.3 with linux.
(See below for a backtrace)

I can also tell you the code runs OK in the current version of
FLTK in svn, so if its an option to use svn current, try that.