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The only compiler characteristics that affect libtool are the flags
needed (if any) to generate PIC objects. In general, if a C compiler
supports certain PIC flags, then any derivative compilers support the
same flags. Until there are some noteworthy exceptions to this rule,
this section will document only C compilers.
The following C compilers have standard command line options, regardless
of the platform:
gcc
-
This is the GNU C compiler, which is also the system compiler for many
free operating systems (FreeBSD, GNU/Hurd, Linux/GNU, Lites, NetBSD, and
OpenBSD, to name a few).
The `-fpic' or `-fPIC' flags can be used to generate
position-independent code. `-fPIC' is guaranteed to generate
working code, but the code is slower on m68k, m88k, and Sparc chips.
However, using `-fpic' on those chips imposes arbitrary size limits
on the shared libraries.
The rest of this subsection lists compilers by the operating system that
they are bundled with:
aix3*
-
aix4*
-
AIX compilers have no PIC flags, since AIX has been ported only to
PowerPC and RS/6000 chips. (10)
hpux10*
-
Use `+Z' to generate PIC.
osf3*
-
Digital/UNIX 3.x does not have PIC flags, at least not on the PowerPC
platform.
solaris2*
-
Use `-KPIC' to generate PIC.
sunos4*
-
Use `-PIC' to generate PIC.
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