libgcc2.c uses macros defined in longlong.h (included via libgcc2.h). Similarily, the code in config/soft-fp uses longlong.h . This library code is automatically linked in by gcc, and its source files are licensed with a special library exceptions to allow users to compile programs with gcc and distribute the resulting binaries under licenses other than GPL (assuming they have sufficent rights to the program being compiled to engage in such a distribution).
longlong.h, however, carries a license notice which only permits distribution according to GPL v3, without any library exception. Which means that the statement that gcc-compiled programs can only be distributed under a GPL-compatible license is actually true for most programs (unless the local law governing the intended distribution recognizes estoppel because of statements like: http://www.gnu.org/licenses/gpl-faq.html#CanIUseGPLToolsForNF ). The discussion about this so far can be found here: http://gcc.gnu.org/ml/gcc/2009-01/msg00072.html http://gcc.gnu.org/ml/gcc/2009-01/msg00075.html -- Summary: gcc ships with GPL-only library parts (longlong.h) Product: gcc Version: 4.4.0 Status: UNCONFIRMED Severity: major Priority: P3 Component: other AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: amylaar at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38758
