On Sunday, 18 June 2017 at 17:57:28 UTC, Eugene Wissner wrote:
On Sunday, 18 June 2017 at 16:08:36 UTC, Russel Winder wrote:
I believe DMD, LDC, and GDC all have the -m32 or -m64 option
to determine the word size of compiled object and executable.
I also believe there are 32-bit and 64-bit builds of the three
compilers. Or are there?
It appears at some time in the past that some of the compilers
when compiled as 32-bit executables, could not generate 64-bit
objects and executables as they did not understand the -m64
option, it was not compiled in.
I am asking this as I cannot test to get experimental data,
but I need to fix a long standing removal of a test in the
SCons D test suite.
Is there a way to determine the bitsize of the compiler
executable, in the test it is assumed that if the OS is 32-bit
then so are the D compilers.
On linux "file" gives you such information about an executable.
Sample output on Slackware (multilib distros like ubuntu/debian
are different):
belka[19:55]:~$ file /usr/bin/gcc-5.3.0
/usr/bin/gcc-5.3.0: ELF 64-bit LSB executable, x86-64, version 1
(SYSV), dynamically linked, interpreter
/lib64/ld-linux-x86-64.so.2, stripped
