https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68854
Bug ID: 68854 Summary: isystem and ansi cause arm assembly preprocessing problem Product: gcc Version: 5.2.1 Status: UNCONFIRMED Severity: normal Priority: P3 Component: preprocessor Assignee: unassigned at gcc dot gnu.org Reporter: vasyl.vavrychuk at globallogic dot com Target Milestone: --- Created attachment 36994 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36994&action=edit source code I have next test.s file #include "test.h" D(b) and in the folder h I have test.h file #define D(x) .globl x Running command /usr/lib/gcc/x86_64-linux-gnu/5/cc1 -E -lang-asm -isystem h test.s --ansi I get # 1 "test.s" # 1 "<built-in>" # 1 "<command-line>" # 1 "/usr/include/stdc-predef.h" 1 3 4 # 1 "<command-line>" 2 # 1 "test.s" # 1 "h/test.h" 1 3 4 # 2 "test.s" 2 # 2 "test.s" 3 4 .globl # 2 "test.s" b which is not correct since ".globl b" is splited and wont be compiled by assebler. If I remove '--ansi' or replace '-isystem' with '-I' result because correct # 1 "test.s" # 1 "<built-in>" # 1 "<command-line>" # 1 "/usr/include/stdc-predef.h" 1 3 4 # 1 "<command-line>" 2 # 1 "test.s" # 1 "h/test.h" 1 # 2 "test.s" 2 .globl b Here I put gcc command line which shows assembler error gcc -ansi -xassembler-with-cpp -isystemh -c test.s -v Using built-in specs. COLLECT_GCC=gcc Target: x86_64-linux-gnu Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.2.1-22ubuntu2' --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-vtable-verify --enable-libmpx --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-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu Thread model: posix gcc version 5.2.1 20151010 (Ubuntu 5.2.1-22ubuntu2) COLLECT_GCC_OPTIONS='-ansi' '-isystem' 'h' '-c' '-v' '-mtune=generic' '-march=x86-64' /usr/lib/gcc/x86_64-linux-gnu/5/cc1 -E -lang-asm -quiet -v -imultiarch x86_64-linux-gnu -isystem h test.s -mtune=generic -march=x86-64 -ansi -fstack-protector-strong -Wformat -Wformat-security -fno-directives-only -o /tmp/ccqIhd5s.s ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu" ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/5/../../../../x86_64-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: h /usr/lib/gcc/x86_64-linux-gnu/5/include /usr/local/include /usr/lib/gcc/x86_64-linux-gnu/5/include-fixed /usr/include/x86_64-linux-gnu /usr/include End of search list. COLLECT_GCC_OPTIONS='-ansi' '-isystem' 'h' '-c' '-v' '-mtune=generic' '-march=x86-64' as -v --64 -o test.o /tmp/ccqIhd5s.s GNU assembler version 2.25.1 (x86_64-linux-gnu) using BFD version (GNU Binutils for Ubuntu) 2.25.1 test.s: Assembler messages: test.s:2: Error: expected symbol name test.s:3: Error: no such instruction: `b' On gcc 4.9 it is not reproduced.