Hi One of our developers has come across an issue with the new release. He provided this piece of code to show the problem:- cat failure.c #include </usr/include/asm-x86_64/msr.h> int main( int argc, char* argv[] ) { return 0; } gcc failure.c /usr/include/asm-x86_64/msr.h:169: error: expected declaration specifiers or ‘...’ before ‘u32’ /usr/include/asm-x86_64/msr.h:169: error: expected declaration specifiers or ‘...’ before ‘u32’ /usr/include/asm-x86_64/msr.h:169: error: expected declaration specifiers or ‘...’ before ‘u32’ /usr/include/asm-x86_64/msr.h: In function ‘rdmsr_on_cpu’: /usr/include/asm-x86_64/msr.h:171: error: ‘l’ undeclared (first use in this function) /usr/include/asm-x86_64/msr.h:171: error: (Each undeclared identifier is reported only once /usr/include/asm-x86_64/msr.h:171: error: for each function it appears in.) /usr/include/asm-x86_64/msr.h:171: error: ‘h’ undeclared (first use in this function) /usr/include/asm-x86_64/msr.h:171: error: ‘msr_no’ undeclared (first use in this function) /usr/include/asm-x86_64/msr.h:171: error: invalid lvalue in asm output 0 /usr/include/asm-x86_64/msr.h:171: error: invalid lvalue in asm output 1 /usr/include/asm-x86_64/msr.h: At top level: /usr/include/asm-x86_64/msr.h:173: error: expected declaration specifiers or ‘...’ before ‘u32’ /usr/include/asm-x86_64/msr.h:173: error: expected declaration specifiers or ‘...’ before ‘u32’ /usr/include/asm-x86_64/msr.h:173: error: expected declaration specifiers or ‘...’ before ‘u32’ /usr/include/asm-x86_64/msr.h: In function ‘wrmsr_on_cpu’: /usr/include/asm-x86_64/msr.h:175: error: ‘msr_no’ undeclared (first use in this function) /usr/include/asm-x86_64/msr.h:175: error: ‘l’ undeclared (first use in this function) /usr/include/asm-x86_64/msr.h:175: error: ‘h’ undeclared (first use in this function) Anyone else seen this or found a bug with these function definitions ? Thanks Phil