[STDCXX-346] [Cygwin] gcc -fPIC warnings

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.1.3
• Fix Version/s: 4.2.0
• Component/s: Build and Installation

Environment

gcc 3.4.4 on Cygwin

• Assignee: Martin Sebor
• Reporter: Mark Brown
• Created: 03/Mar/07 19:22
• Updated: 27/Mar/07 23:51
• Resolved: 27/Mar/07 23:51

Description

gcc shared library build on Cygwin spits out a warning message about the -fPIC flag on the command line for every .cpp file:

make[2]: Entering directory `/home/mbrown/stdcxx-12d/lib'
generating dependencies for $(TOPDIR)/src/atomic.s
generating dependencies for $(TOPDIR)/src/wctype.cpp
/home/mbrown/stdcxx/src/wctype.cpp:0: warning: -fPIC ignored for target (all code is position independent)

Removing the -fPIC gets rid of the warnings so I'm guessing Cygwin might need the same conditional as the one for AIX in gcc.config:

1. IBM AIX code is always position independent
   ifneq ($(OSNAME),AIX)
   PICFLAGS = -fPIC
   endif

Here's the archived post where this problem was first raised:
http://mail-archives.apache.org/mod_mbox/incubator-stdcxx-dev/200703.mbox/[e-mail]%3e