grsecurity forums

Hi,

I'm having the same issue as this one here https://forums.grsecurity.net/viewtopic.php?f=3&t=3484

I'm using Fedora 20.

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Your gcc installation does not support plugins.  If the necessary headers for plugin support are missing, they should be installed.  On Debian, apt-get install gcc-<ver>-plugin-dev.  If you choose to ignore this error and lessen the improvements provided by this patch, re-run make with the DISABLE_PAX_PLUGINS=y argument..  Stop.


I tried to collect all information requested in that other thread for debugging:

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gcc -E -shared - -o /dev/null -I`gcc -print-file-name=plugin`/include 2>&1 <<EOF
> #include "gcc-plugin.h"
> #include "tree.h"
> #include "tm.h"
> #include "rtl.h"
> #ifdef ENABLE_BUILD_WITH_CXX
> #warning g++
> #else
> #warning gcc
> #endif
> EOF


output:

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<stdin>:8:2: warning: #warning gcc [-Wcpp]


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rpm -qa gcc*
gcc-4.8.2-7.fc20.x86_64
gcc-plugin-devel-4.8.2-7.fc20.x86_64


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bash ./scripts/gcc-plugin.sh gcc g++ gcc
g++


Do you have any hints for me on how to find out why it fails or how this issue can be fixed?

thanks in advance!

which grsec version are you using? also try to run bash -x scripts/gcc-plugin.sh g++ g++ gcc and post me the output please.

sorry forgot about the grsec version:
grsecurity-3.0-3.14.6-201406101411

[ updated: removed irrelevant cmd output ]

the previous post did not contain the actual requested command, but here we go:

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bash -x scripts/gcc-plugin.sh g++ g++ gcc
++ dirname scripts/gcc-plugin.sh
+ srctree=scripts
++ gcc -print-file-name=plugin
+ gccplugins_dir=/usr/lib/gcc/x86_64-redhat-linux/4.8.2/plugin
++ g++ -E -shared - -o /dev/null -Iscripts/../tools/gcc -I/usr/lib/gcc/x86_64-redhat-linux/4.8.2/plugin/include
+ plugincc='scripts/gcc-plugin.sh: line 12: g++: command not found'
+ '[' 127 -eq 0 ']'


installing it fixed the issue:

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yum install gcc-c++


thank you!!

yes, from gcc 4.8 on you need g++ (or any capable c++ compiler, clang works too) to compile gcc plugins as gcc itself is compiled as c++ code (gcc 4.7 supports both ways, most distros opted for c++ mode already at that time, the gcc-plugin.sh scripts detects this too).