Tuning autotoolized packages via EXTRA_ECONF

Ebuilds for autotoolized packages has ability to pass extra options to underlaid ./configure scripts. It is supposed (I guess) that most of the time it doesn’t needed to end users. It is recommended to use when you want to add some per-package configuration option(s) without necessity to hack a particular ebuild.

But actually there is at least one candidate to be added for all (autotoolized) packages: --disable-dependency-tracking. It is responsible to add special options to compiler CLI (like -MD, -MP, -MF), so latter, along w/ output of object file, will generate a make formatted dependencies for particular source. That is quite useful when develop software, but completely useless (and waste time, CPU, disk I/O and space) for one time compilation (like emerging a package).

Also, to reduce spam amount of compilation details in autotoolized packages, one may add --enable-silent-rules to turn this

libtool: compile:  gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I../../../../libX11-1.6.2/modules/om/generic
-I../../../src -I../../../include/X11 -I../../../../libX11-1.6.2/include -I../../../../libX11-1.6.2/
include/X11 -I../../../include -I../../../include/X11 -I../../../../libX11-1.6.2/src/xcms -I../../..
/../libX11-1.6.2/src/xkb -I../../../../libX11-1.6.2/src/xlibi18n -I../../../../libX11-1.6.2/src -D_B
SD_SOURCE -D_BSD_SOURCE -DHAS_FCHOWN -DHAS_STICKY_DIR_BIT -DMALLOC_0_RETURNS_NULL -Wall -Wpointer-ar
ith -Wmissing-declarations -Wformat=2 -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wba
d-function-cast -Wold-style-definition -Wdeclaration-after-statement -Wunused -Wuninitialized -Wshad
ow -Wmissing-noreturn -Wmissing-format-attribute -Wredundant-decls -Werror=implicit -Werror=nonnull
-Werror=init-self -Werror=main -Werror=missing-braces -Werror=sequence-point -Werror=return-type -We
rror=trigraphs -Werror=array-bounds -Werror=write-strings -Werror=address -Werror=int-to-pointer-cas
t -Werror=pointer-to-int-cast -fno-strict-aliasing -g -O2 -MT omTextExt.lo -MD -MP -MF .deps/omTextE
xt.Tpo -c ../../../../libX11-1.6.2/modules/om/generic/omTextExt.c  -fPIC -DPIC -o .libs/omTextExt.o
libtool: compile:  gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I../../../../libX11-1.6.2/modules/om/generic
-I../../../src -I../../../include/X11 -I../../../../libX11-1.6.2/include -I../../../../libX11-1.6.2/
include/X11 -I../../../include -I../../../include/X11 -I../../../../libX11-1.6.2/src/xcms -I../../..
/../libX11-1.6.2/src/xkb -I../../../../libX11-1.6.2/src/xlibi18n -I../../../../libX11-1.6.2/src -D_B
SD_SOURCE -D_BSD_SOURCE -DHAS_FCHOWN -DHAS_STICKY_DIR_BIT -DMALLOC_0_RETURNS_NULL -Wall -Wpointer-ar
ith -Wmissing-declarations -Wformat=2 -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Wba
d-function-cast -Wold-style-definition -Wdeclaration-after-statement -Wunused -Wuninitialized -Wshad
ow -Wmissing-noreturn -Wmissing-format-attribute -Wredundant-decls -Werror=implicit -Werror=nonnull
-Werror=init-self -Werror=main -Werror=missing-braces -Werror=sequence-point -Werror=return-type -We
rror=trigraphs -Werror=array-bounds -Werror=write-strings -Werror=address -Werror=int-to-pointer-cas
t -Werror=pointer-to-int-cast -fno-strict-aliasing -g -O2 -MT omTextExt.lo -MD -MP -MF .deps/omTextE
xt.Tpo -c ../../../../libX11-1.6.2/modules/om/generic/omTextExt.c -o omTextExt.o >/dev/null 2>&1
mv -f .deps/omTextExt.Tpo .deps/omTextExt.Plo
/bin/sh ../../../libtool  --tag=CC   --mode=compile gcc -std=gnu99 -DHAVE_CONFIG_H -I. -I../../../..
/libX11-1.6.2/modules/om/generic -I../../../src -I../../../include/X11  -I../../../../libX11-1.6.2/i
nclude -I../../../../libX11-1.6.2/include/X11 -I../../../include -I../../../include/X11 -I../../../.
./libX11-1.6.2/src/xcms -I../../../../libX11-1.6.2/src/xkb -I../../../../libX11-1.6.2/src/xlibi18n -
I../../../../libX11-1.6.2/src -D_BSD_SOURCE  -D_BSD_SOURCE -DHAS_FCHOWN -DHAS_STICKY_DIR_BIT    -DMA
LLOC_0_RETURNS_NULL -Wall -Wpointer-arith -Wmissing-declarations -Wformat=2 -Wstrict-prototypes -Wmi
ssing-prototypes -Wnested-externs -Wbad-function-cast -Wold-style-definition -Wdeclaration-after-sta
tement -Wunused -Wuninitialized -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wredundant-d
ecls -Werror=implicit -Werror=nonnull -Werror=init-self -Werror=main -Werror=missing-braces -Werror=
sequence-point -Werror=return-type -Werror=trigraphs -Werror=array-bounds -Werror=write-strings -Wer
ror=address -Werror=int-to-pointer-cast -Werror=pointer-to-int-cast -fno-strict-aliasing -g -O2 -MT
omTextPer.lo -MD -MP -MF .deps/omTextPer.Tpo -c -o omTextPer.lo ../../../../libX11-1.6.2/modules/om/
generic/omTextPer.c

into this

make[3]: Entering directory '/storage/tmp/paludis/x11-libs-libX11-1.6.2/work/libX11-1.6.2-amd64/modu
les/om/generic'
CC       omDefault.lo
CC       omGeneric.lo
CC       omImText.lo
CC       omText.lo
CC       omTextEsc.lo
CC       omTextExt.lo
CC       omTextPer.lo
CC       omXChar.lo
CCLD     libxomGeneric.la
make[3]: Leaving directory '/storage/tmp/paludis/x11-libs-libX11-1.6.2/work/libX11-1.6.2-amd64/modu
les/om/generic'

Here is a related part of /etc/paludis/bashrc

EXTRA_ECONF="--disable-dependency-tracking --enable-silent-rules"
CMAKE_VERBOSE=OFF

Note

The last option (I have to mention) has the same effect (reduce spam) for cmake based packages which are by default (in eclass) too verbose.

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