[Tcl-bugs] [ tcl-Bugs-1586861 ] CPPFLAGS is not properly supported

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Bugs item #1586861, was opened at 2006-10-29 13:39
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Category: 52. Configuration and Build Tools
Group: current: 8.4.14
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: eponym (eponym)
Assigned to: Nobody/Anonymous (nobody)
Summary: CPPFLAGS is not properly supported

Initial Comment:
The Tcl configure script, when it processes a number of
actions during the configure process, uses CPPFLAGS to
test the compiler.  But when it comes to the actual
build process, this environment variable is totally
ignored.

The reason for needing this is to better support a
general application environment, and the integration of
Tcl libraries into that environment.  In these builds,
a clean separation is desired between CFLAGS (used only
for the C compiler), CXXFLAGS (used only for the C++
compiler), and CPPFLAGS (for settings in common between
the C and C++ compilers).

As an example of how this failure causes problems, on
the Solaris platform, the -D_POSIX_C_SOURCE=200112L
flag should be set in CFLAGS to conform to the rest of
the application build, and -D__EXTENSIONS__ flag should
be set in CPPFLAGS.  But with this combination of
environment variables, and -D__EXTENSIONS__ in CPPFLAGS
being ignored, the compilation of tclUnixChan.c
fails because certain symbols (such as TIOCMGET) from
<sys/termios.h> do not get defined.


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