Description
Description
The perl source's Configure script fails when the output of gcc -v contains entries that are enclosed in quotation marks.
When Configure is run, prior to building perl, one of the checks it performs is determining pre-defined compiler flags. One way it does this is to run gcc -v and parse its output. However it is possible when gcc is built to have passed it configuration options in such a way as its gcc will produce output that has single quotes. For example:
# gcc -v
Using built-in specs.
COLLECT_GCC=/usr/bin/arm-openwrt-linux-muslgnueabi-gcc_orig
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-openwrt-linux-muslgnueabi/11.2.0/lto-wrapper
Target: arm-openwrt-linux-muslgnueabi
Configured with: /builder/shared-workdir/build/sdk/build_dir/target-arm_cortex-a7+neon-vfpv4_musl_eabi/gcc-11.2.0/configure --target=arm-openwrt-linux --host=arm-openwrt-linux --build=x86_64-pc-linux-gnu --program-prefix= --program-suffix= --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --libexecdir=/usr/lib --sysconfdir=/etc --datadir=/usr/share --localstatedir=/var --mandir=/usr/man --infodir=/usr/info --disable-nls 'CXXFLAGS_FOR_TARGET=-g -O2 -D_GLIBCXX_INCLUDE_NEXT_C_HEADERS' --build=x86_64-pc-linux-gnu --host=arm-openwrt-linux-muslgnueabi --target=arm-openwrt-linux-muslgnueabi --enable-languages=c,c++ --with-bugurl=https://dev.openwrt.org/ --with-pkgversion='OpenWrt GCC 11.2.0' --enable-shared --disable-__cxa_atexit --with-default-libstdcxx-abi=gcc4-compatible --enable-target-optspace --with-gnu-ld --disable-nls --disable-libsanitizer --disable-libvtv --disable-libcilkrts --disable-libmudflap --disable-libmpx --disable-multilib --disable-libgomp --disable-libquadmath --disable-libssp --disable-decimal-float --disable-libstdcxx-pch --with-host-libstdcxx=-lstdc++ --prefix=/usr --libexecdir=/usr/lib --with-local-prefix=/usr --with-stage1-ldflags=-lstdc++ --with-float=hard
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.2.0 (OpenWrt GCC 11.2.0)
Note the single quotes starting at CXXFLAGS_FOR_TARGET and ending at -D_GLIBCXX_INCLUDE_NEXT_C_HEADERS
This causes Configure to pass on a single quote into config.sh, which creates mis-matched quotes with predictable results. For example the above output from gcc -v makes the following line in the resulting config.sh
ccsymbols='_GLIBCXX_INCLUDE_NEXT_C_HEADERS'=1'
The resulting mismatched quotes cause problems with everything that tries to invoke config.sh
Affected systems include OpenWrt and any other device using ENTWARE as its package system.
Steps to Reproduce
On an affected system:
- wget https://www.cpan.org/src/5.0/perl-5.37.6.tar.gz
- tar -xvzf perl-5.37.6.tar.gz
- cd perl-5.37.6
- ./Configure
Expected behavior
Should configure properly
Perl configuration
N/A
Patch
The following patch (made against Configure itself) will strip quotes from the output of "gcc -v" before further processing:
--- Configure.orig 2022-11-14 14:52:18.000000000 -0400
+++ Configure 2022-12-11 16:47:27.642795981 -0400
@@ -23770,11 +23770,11 @@
extern int foo;
EOF
for i in \`$cc -v -c tmp.c 2>&1 $postprocess_cc_v\`
do
case "\$i" in
- -D*) echo "\$i" | $sed 's/^-D//';;
+ -D*) echo "\$i" | $sed 's/^-D//;s/['\''\"]//g';;
-A*) $test "$gccversion" && echo "\$i" | $sed 's/^-A//' | $sed 's/\(.*\)(\(.*\))/\1=\2/';;
esac
done
$rm_try
EOS