On 27 Mar 2017, at 23:11, Mark Millard <markmi_at_dsl-only.net> wrote: > > On 2017-Mar-27, at 5:53 AM, Dimitry Andric <dim at FreeBSD.org> wrote: >> On 27 Mar 2017, at 12:25, Mark Millard <markmi at dsl-only.net> wrote: >>> >>> On 2017-Mar-27, at 2:41 AM, Dimitry Andric <dim_at_FreeBSD.org> wrote: >>>> On 26 Mar 2017, at 23:36, Mark Millard <markmi_at_dsl-only.net> wrote: >> ... >>>>> Installed packages to be REMOVED: >>>>> llvm40-4.0.0.r4 >>>>> >>>>> Number of packages to be removed: 1 >>>>> >>>>> The operation will free 49 GiB. >>>> >>>> Yes, this is big. But there is no real need to build the llvm ports >>>> with debug information, unless you want to hack on llvm itself. And >>>> in that case, you are better served by a Subversion checkout or Git >>>> clone from upstream instead. >> ... >>> Historically unless something extreme like this ends up >>> involved I build everything using WITH_DEBUG= or explicit >>> -g's in order to have better information on any failure. >> >> The problem with the ports implementation of WITH_DEBUG is that it >> always disables all optimizations, without a possibility to override. >> Which bloats the resulting object files, libraries and executables, and >> especially so for large C++ projects such as LLVM. >> >> I can recommend the following workaround. If you want to build a port >> with optimizations disabled, you can always pass -O0 in CFLAGS. >> >> -Dimitry >> >> Index: Mk/bsd.port.mk >> =================================================================== >> --- Mk/bsd.port.mk (revision 436685) >> +++ Mk/bsd.port.mk (working copy) >> _at__at_ -1646,7 +1646,7 _at__at_ MAKE_ENV+= DONTSTRIP=yes >> STRIP_CMD= ${TRUE} >> .endif >> DEBUG_FLAGS?= -g >> -CFLAGS:= ${CFLAGS:N-O*:N-fno-strict*} ${DEBUG_FLAGS} >> +CFLAGS:= ${CFLAGS} ${DEBUG_FLAGS} >> .if defined(INSTALL_TARGET) >> INSTALL_TARGET:= ${INSTALL_TARGET:S/^install-strip$/install/g} >> .endif > > Interesting. WITH_DEBUG's description in the file does not > mention that stripping of optimization flags: > > # WITH_DEBUG - If set, debugging flags are added to CFLAGS and the > # binaries don't get stripped by INSTALL_PROGRAM or > # INSTALL_LIB. Besides, individual ports might > # add their specific to produce binaries for debugging > # purposes. You can override the debug flags that are > # passed to the compiler by setting DEBUG_FLAGS. It is > # set to "-g" at default. > > I'll probably give myself an override that I can specify in > /etc/make.conf , such as: > > # svnlite diff /usr/ports/Mk/bsd.port.mk > Index: /usr/ports/Mk/bsd.port.mk > =================================================================== > --- /usr/ports/Mk/bsd.port.mk (revision 436747) > +++ /usr/ports/Mk/bsd.port.mk (working copy) > _at__at_ -1646,7 +1646,11 _at__at_ > STRIP_CMD= ${TRUE} > .endif > DEBUG_FLAGS?= -g > +.if defined(ALLOW_OPTIMIZATIONS_FOR_WITH_DEBUG) > +CFLAGS:= ${CFLAGS} ${DEBUG_FLAGS} > +.else > CFLAGS:= ${CFLAGS:N-O*:N-fno-strict*} ${DEBUG_FLAGS} > +.endif > .if defined(INSTALL_TARGET) > INSTALL_TARGET:= ${INSTALL_TARGET:S/^install-strip$/install/g} > .endif Effectively, this gives some sort of support for three of CMake's build types, e.g: * Debug, which disables optimization, and obviously adds debuginfo * Release, which optimizes for speed, and does not add debuginfo * RelWithDebInfo, similar to Release but does add debuginfo It would be nice if there was some way of directly utilizing these. The RelWithDebInfo target is very useful with the LLVM projects. -Dimitry
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:41:11 UTC