This is one of those "it works fine until...".
Background:
I am executing bash script to build a C++ library.
From options passed to the script it supposedly verify that selected crosscomplier is OK to use.
To aid development the compiler is optioned with " -v -V -qversion " in " do ...unit done " style loop.
I understand and use "-v" verbose option often.
I do not know why -V and -qversion are used since they are invalid options,
But that is NOT the problem, I can read an error log to identify the issue of invalid options.
Problem:
AT present the bash script output give no indication of failure.
Only the log file has the compiler verbose output in it.
How do I pass the compiler error or full verbose message BACK to bash script?
Or is it even possible ?
I would hope some kind of redirection would work, but I am not that verse in redirecting bash outputs.
I hope somebody in this group can help to figure it out.
I am enclosing the relevant part of the script and part of the log file.
bash script
# Provide some information about the compiler.
$as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
set X $ac_compile
ac_compiler=$2
echo "@line $LINENO BUG checkiin for -V and -qversion "
for ac_option in --version -v -V -qversion; do
{ { ac_try="$ac_compiler $ac_option >&5"
case "(($ac_try" in
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
*) ac_try_echo=$ac_try;;
esac
eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
$as_echo "$ac_try_echo"; } >&5
(eval "$ac_compiler $ac_option >&5") 2>conftest.err
ac_status=$?
*************** ??
if test -s conftest.err; then
sed '10a\
... rest of stderr output deleted ...
10q' conftest.err >conftest.er1
cat conftest.er1 >&5
************** ??
fi
rm -f conftest.er1 conftest.err
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }
done
The answer MAY be in indicated part - I just do not know.
This is part of debug output in log file
configure:3532: $? = 0
configure:3521: arm-linux-gnueabihf-gcc -v >&5
Using built-in specs.
COLLECT_GCC=arm-linux-gnueabihf-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc-cross/arm-linux-gnueabihf/5/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm --disable-libquadmath --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-armhf-cross/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-armhf-cross --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-armhf-cross --with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libgcj --enable-objc-gc --enable-multiarch --enable-multilib --disable-sjlj-exceptions --with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard --with-mode=thumb --disable-werror --enable-multilib --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=arm-linux-gnueabihf --program-prefix=arm-linux-gnueabihf- --includedir=/usr/arm-linux-gnueabihf/include
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9)
configure:3532: $? = 0
configure:3521: arm-linux-gnueabihf-gcc -V >&5
this is the output - from compiler itself - I like to also see in bash script
arm-linux-gnueabihf-gcc: error: unrecognized command line option '-V'
arm-linux-gnueabihf-gcc: fatal error: no input files
compilation terminated.
configure:3532: $? = 1
Background:
I am executing bash script to build a C++ library.
From options passed to the script it supposedly verify that selected crosscomplier is OK to use.
To aid development the compiler is optioned with " -v -V -qversion " in " do ...unit done " style loop.
I understand and use "-v" verbose option often.
I do not know why -V and -qversion are used since they are invalid options,
But that is NOT the problem, I can read an error log to identify the issue of invalid options.
Problem:
AT present the bash script output give no indication of failure.
Only the log file has the compiler verbose output in it.
How do I pass the compiler error or full verbose message BACK to bash script?
Or is it even possible ?
I would hope some kind of redirection would work, but I am not that verse in redirecting bash outputs.
I hope somebody in this group can help to figure it out.
I am enclosing the relevant part of the script and part of the log file.
bash script
# Provide some information about the compiler.
$as_echo "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
set X $ac_compile
ac_compiler=$2
echo "@line $LINENO BUG checkiin for -V and -qversion "
for ac_option in --version -v -V -qversion; do
{ { ac_try="$ac_compiler $ac_option >&5"
case "(($ac_try" in
*\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
*) ac_try_echo=$ac_try;;
esac
eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
$as_echo "$ac_try_echo"; } >&5
(eval "$ac_compiler $ac_option >&5") 2>conftest.err
ac_status=$?
*************** ??
if test -s conftest.err; then
sed '10a\
... rest of stderr output deleted ...
10q' conftest.err >conftest.er1
cat conftest.er1 >&5
************** ??
fi
rm -f conftest.er1 conftest.err
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }
done
The answer MAY be in indicated part - I just do not know.
This is part of debug output in log file
configure:3532: $? = 0
configure:3521: arm-linux-gnueabihf-gcc -v >&5
Using built-in specs.
COLLECT_GCC=arm-linux-gnueabihf-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc-cross/arm-linux-gnueabihf/5/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libitm --disable-libquadmath --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-armhf-cross/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-armhf-cross --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-armhf-cross --with-arch-directory=arm --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --disable-libgcj --enable-objc-gc --enable-multiarch --enable-multilib --disable-sjlj-exceptions --with-arch=armv7-a --with-fpu=vfpv3-d16 --with-float=hard --with-mode=thumb --disable-werror --enable-multilib --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=arm-linux-gnueabihf --program-prefix=arm-linux-gnueabihf- --includedir=/usr/arm-linux-gnueabihf/include
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9)
configure:3532: $? = 0
configure:3521: arm-linux-gnueabihf-gcc -V >&5
this is the output - from compiler itself - I like to also see in bash script
arm-linux-gnueabihf-gcc: error: unrecognized command line option '-V'
arm-linux-gnueabihf-gcc: fatal error: no input files
compilation terminated.
configure:3532: $? = 1