https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112422
Bug ID: 112422
Summary: Build process does a redundant number of checks ?
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
I just ran a gcc trunk build. The configure line was
CC="clang" CXX="clang++" \
../trunk.year/configure --prefix=/home/dcb38/gcc/results.$DATE.asan.ubsan \
--disable-multilib \
--disable-bootstrap \
--with-build-config=bootstrap-asan \
--with-build-config=bootstrap-ubsan \
--with-pkgversion=$HASH \
--enable-checking=df,extra,fold,rtl,yes \
--enable-languages=c,c++,fortran
The command I used was
$ (date;make -j 20;date) > mk.out 2>&1
$ grep "checking for" mk.out | sort -k 2 | uniq -c | sort -rn > 1.out
$ head 1.out
20 checking for C compiler default output file name... a.out
19 checking for a BSD-compatible install... /usr/bin/install -c
18 checking for egrep... /usr/bin/grep -E
17 checking for x86_64-pc-linux-gnu-ranlib... ranlib
17 checking for x86_64-pc-linux-gnu-ar... ar
17 checking for unistd.h... (cached) yes
15 checking for x86_64-pc-linux-gnu-objdump... objdump
15 checking for minix/config.h... no
14 checking for gawk... gawk
12 checking for x86_64-pc-linux-gnu-gcc... clang
That seems a lot of redundant checking to me.
Perhaps the build process could be made faster by only checking some properties
once and remembering the result for later ?
