winpty/unix-adapter/Makefile
Ryan Prichard 549472ec78 unix-adapter: Link statically with cyggcc_s-1.dll and cygstdc++-6.dll.
* At least for now, I'm shipping Cygwin/MSYS binaries.  On Cygwin (but
   not MSYS), the console.exe executable previously linked dynamically
   to cyggcc_s-1.dll and cygstdc++-6.dll.

   Linking dynamically with cygstdc++-6.dll seems risky for a binary
   not distributed by Cygwin, because G++'s Windows ABI is unstable, at
   least as of G++ 4.7, which turned on the __thiscall calling
   convention.  If a binary I ship ever comes into contact with a
   4.7-versioned cygstdc++-6.dll, then my binary will (very likely)
   segfault.

   So far, I've only observed this ABI incompatibility with MinGW,
   where a sufficiently upgraded MinGW configuration comes with a
   libstdc++-6.dll that is completely incompatible with every previous
   libstdc++-6.dll, so that every program built against the older
   libstdc++-6.dll segfaults immediately.  For now, Cygwin seems stuck
   at G++ 4.5, and my impression (possibly incorrect), is that G++'s
   Windows ABI was stable prior to 4.7.  I think G++'s Linux ABI is
   stable.  Presumably Cygwin will eventually update its compiler,
   though, so it makes sense to fix the problem early.

   I believe I originally chose to dynamically link the libraries
   because it was the default behavior, and I was afraid that a
   non-default option would break something.  It turns out that
   linking statically with cygstdc++-6 *does* break something -- it
   causes linker errors if the code uses std::cerr.  The workaround
   is not to use std::cerr.  This is not a problem for the
   unix-adapter, which already has to put up with MSYS' gimpy G++ 3.4
   compiler.
2012-12-20 04:07:55 -08:00

40 lines
1.4 KiB
Makefile

# Copyright (c) 2011-2012 Ryan Prichard
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
# IN THE SOFTWARE.
include ../config.mk
include ../config-unix.mk
PROGRAM = ../build/console.exe
OBJECTS = main.o Shared.o
CXXFLAGS += -I../include
LDFLAGS += $(LDFLAGS_STATIC_LIBSTDCXX) ../build/winpty.dll
all : $(PROGRAM)
$(PROGRAM) : $(OBJECTS)
@echo Linking $@
@$(CXX) -o $@ $^ $(LDFLAGS)
.PHONY : clean
clean:
rm -f $(PROGRAM) *.o *.d
-include $(OBJECTS:.o=.d)