[Bug preprocessor/92306] New: stringize linux cut off the word

[amarchini at kcftech dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92306

            Bug ID: 92306
           Summary: stringize linux cut off the word
           Product: gcc
           Version: 7.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: preprocessor
          Assignee: unassigned at gcc dot gnu.org
          Reporter: amarchini at kcftech dot com
  Target Milestone: ---

Created attachment 47146
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47146&action=edit
this is the file used to test the pre-processor

While setting up defines for various folders I found that the preprocessor will
truncate the word linux . 

I am enclosing two files from the following the gcc command line.

gcc -E exp.c | grep -v ^# > preprocessed.c


gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.4.0-1ubuntu1~18.04.1' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --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-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix