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 <d...@freebsd.org> wrote:
>>> On 26 Mar 2017, at 23:36, Mark Millard <mar...@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)
> @@ -1646,7 +1646,7 @@ 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)
@@ -1646,7 +1646,11 @@
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
===
Mark Millard
markmi at dsl-only.net
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