On 12/08/13 06:07, William Harrington wrote:
Greetings devs,
We have a slight problem in gcc temp system:
g++ -c -g -O2 -DIN_GCC -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long
-Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H
-DGENERATOR_FILE -I. -Ibuild -I../../gcc-4.8.1/gcc
-I../../gcc-4.8.1/gcc/build -I../../gcc-4.8.1/gcc/../include
-I../../gcc-4.8.1/gcc/../libcpp/include -I/cross-tools/include
-I/cross-tools/include -I/cross-tools/include
-I../../gcc-4.8.1/gcc/../libdecnumber
-I../../gcc-4.8.1/gcc/../libdecnumber/dpd -I../libdecnumber
-I../../gcc-4.8.1/gcc/../libbacktrace -DCLOOG_INT_GMP
-I/cross-tools/include -I/cross-tools/include \
-o build/genconstants.o
../../gcc-4.8.1/gcc/genconstants.c
cc1plus: error: unrecognized command line option "-Wno-narrowing"
cc1plus: error: unrecognized command line option
"-Wno-overlength-strings"
The host compiler is used to create some host build tools for the gcc
build.
Thus, it'll run g++ which will be the host's gcc.
I was using the updated lfs livecd I recently put linux 3.10.5 onto,
and it seems moving to gcc-4.8.1 we have Wno error checking going bad.
The following dialect options are only available starting with gcc 4.7:
-Wno-narrowing and -Wno-overlength-strings
This is going to cause some problems with hosts using GCC < 4.7.
In config/warnings.m4 there is this change that is already in gcc 4.8.1:
for real_option in $1; do
# Do the check with the no- prefix removed since gcc silently
# accepts any -Wno-* option on purpose
case $real_option in
- -Wno-*) option=-W`expr $real_option : '-Wno-\(.*\)'` ;;
+ -Wno-*) option=-W`expr x$real_option : 'x-Wno-\(.*\)'` ;;
*) option=$real_option ;;
esac
I tried the old Wno line but it didn't help.
Any ideas how we will get past this?
We can remove -Wno-narrowing and -Wno-overlength-strings from
gcc/Makefile
Upping the host system requirements to gcc 4.7 is a bit extreme.
Sincerely,
WIlliam Harrington
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Hmm just run through two builds, because i forgot the specs path when
compiling the final gcc and never ran into that
I do remember seeing the line but is was as a warning, rather than and
error, how about having
|--disable-werror added?|
martin
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