cvs commit: src/share/mk bsd.lib.mk bsd.libnames.mk bsd.prog.mk sys.mk

[John Birrell]

jb          2008-05-22 01:14:43 UTC

  FreeBSD src repository

  Modified files:
    share/mk             bsd.lib.mk bsd.libnames.mk bsd.prog.mk 
                         sys.mk 
  Log:
  Add support for the Compact C Type (CTF) conversions throughout FreeBSD's
  system makefiles.
  
  Note that the CTF conversion defaults to off. We may choose to change this
  default later if DTrace proves popular and people are prepared to wear
  the compilation performance impact of compiling with debug symbols all the
  time.
  
  Setting NO_CTF in the make args or user environment turns off CTF conversion.
  Even if we choose to default CTF generation to on later, we still need
  NO_CTF so that the buildworld process can bootstrap the tools without
  needlessly generating CTF data for temporary tools.
  
  Setting WITH_CTF in the make args or user environment (and _NOT_ in
  /etc/make.conf) is the only way to enable CTF data conversion. Nore that
  this can't be implemented the same way that the WITH_ and WITHOUT_ stuff
  is implemented throughout the buildworld because the CTF conversion needs
  to work when building a simple object without a Makefile, using the
  default rules in sys.mk.
  
  Typing 'make test.o' with no makefile and just a source file test.c
  should work. Also, typing 'make WITH_CTF=1 test.o without a makefile and
  just a source file test.c should work and produce an object with a CTF
  elf section. Typing 'make WITH_CTF=1 CFLAGS=-g test.o' without a makefile
  and just a source file test.c should produce an object with both a CTF
  elf section and the debug elf sections.
  
  In the FreeBSD build where more .mk files are used than just sys.mk
  which is included my make by default, the use of DEBUG_FLAGS is the
  correct way to enable a debug build. The important thing to note here
  is that it is the DEBUG_FLAGS setting that prevents libraries and
  programs from being stripped on installation. So, for the addition of
  CTF data conversion, setting DEBUG_FLAGS to contain -g, without NO_CTF,
  will cause the ctfconvert and ctfmerge build programs to be executed
  also with the -g arg so that debug symbols are retained rather than
  being removed after the CTF data elf section has been added.
  
  Add DTrace libraries to the list of libnames.
  
  Revision  Changes    Path
  1.185     +40 -0     src/share/mk/bsd.lib.mk
  1.108     +4 -0      src/share/mk/bsd.libnames.mk
  1.151     +10 -0     src/share/mk/bsd.prog.mk
  1.102     +76 -0     src/share/mk/sys.mk