Hello everybody! To cleanup my port of GCC (9.2.0) to Jehanne OS (http://jehanne.io) I'd like to add a `--posixly` command line options to the gcc driver that should be expanded to a couple of -isystem and -L options to ease the compilation of POSIX programs (Jehanne is a Plan 9 derivative so it's not a POSIX system).
So I defined in the gcc/config/jehanne.h (see attachment) the macros LINK_SPEC, LIB_SPEC and CPP_SPEC that substitute such command line options as required. What's weird is that, if I dump the specs file with `gcc -dumpspecs` and then load it with `gcc -specs=dump` it works like a charm, properly translating the --posixly option. However without the -specs option, it can't recognise such option. I have no idea of what I'm missing. I tried to put the dump into PREFIX/lib/gcc/x86_64-jehanne/9.2.0/specs (also in the attachments) but it doesn't change anything. Yet, by using the -specs= option it works. Am I missing something obvious? Thanks for your help and sorry if the issue is dumb: I tried my best to understand the Gcc Internals but I was unable to fix this. Giacomo
specs
Description: Binary data
/* * This file is part of Jehanne. * * Copyright (C) 2016-2020 Giacomo Tesio <giac...@tesio.it> * * Jehanne is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, version 2 of the License. * * Jehanne is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with Jehanne. If not, see <http://www.gnu.org/licenses/>. */ #undef TARGET_JEHANNE #define TARGET_JEHANNE 1 #undef DRIVER_SELF_SPECS #define DRIVER_SELF_SPECS "%{-posixly}" /* Default arguments you want when running x86_64-jehanne-gcc */ #undef LINK_SPEC #define LINK_SPEC "%{-posixly:-L/posix/lib}" #undef LIB_SPEC #define LIB_SPEC "%{-posixly:%{!shared:%{g*:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}} -ljehanne" #undef STANDARD_STARTFILE_PREFIX #define STANDARD_STARTFILE_PREFIX "/arch/amd64/lib/" #undef CPP_SPEC #define CPP_SPEC "%{-posixly:-isystem/posix/include}" /* Architecture specific header (u.h) goes here (from config.gcc) */ #define ARCH_INCLUDE_DIR NATIVE_SYSTEM_HEADER_DIR /* The default include dir is /sys/include */ #define PORTABLE_INCLUDE_DIR "/sys/include" #ifdef GPLUSPLUS_INCLUDE_DIR /* Pick up GNU C++ generic include files. */ # define ID_GPLUSPLUS { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1, GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 }, #else # define ID_GPLUSPLUS #endif #ifdef GPLUSPLUS_TOOL_INCLUDE_DIR /* Pick up GNU C++ target-dependent include files. */ # define ID_GPLUSPLUS_TOOL { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1, GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 1 }, #else # define ID_GPLUSPLUS_TOOL #endif #ifdef GPLUSPLUS_BACKWARD_INCLUDE_DIR /* Pick up GNU C++ backward and deprecated include files. */ # define ID_GPLUSPLUS_BACKWARD { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1, GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 }, #else # define ID_GPLUSPLUS_BACKWARD #endif #ifdef GCC_INCLUDE_DIR /* This is the dir for gcc's private headers. */ # define ID_GCC { GCC_INCLUDE_DIR, "GCC", 0, 0, 0, 0 }, #else # define ID_GCC #endif #ifdef PREFIX_INCLUDE_DIR # define ID_PREFIX { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0 }, #else # define ID_PREFIX #endif #if defined (CROSS_INCLUDE_DIR) && defined (CROSS_DIRECTORY_STRUCTURE) && !defined (TARGET_SYSTEM_ROOT) # define ID_CROSS { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0 }, #else # define ID_CROSS #endif #ifdef TOOL_INCLUDE_DIR /* Another place the target system's headers might be. */ # define ID_TOOL { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0 }, #else # define ID_TOOL #endif #undef INCLUDE_DEFAULTS #define INCLUDE_DEFAULTS \ { \ ID_GPLUSPLUS \ ID_GPLUSPLUS_TOOL \ ID_GPLUSPLUS_BACKWARD \ ID_GCC \ ID_PREFIX \ ID_CROSS \ ID_TOOL \ { PORTABLE_INCLUDE_DIR, 0, 0, 0, 1, 0 }, \ { ARCH_INCLUDE_DIR, 0, 0, 0, 1, 0 }, \ { 0, 0, 0, 0, 0, 0 } \ } /* Files that are linked before user code. The %s tells gcc to look for these files in the library directory. */ #undef STARTFILE_SPEC #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s" /* Files that are linked after user code. */ #undef ENDFILE_SPEC #define ENDFILE_SPEC "crtend.o%s crtn.o%s" /* Fix https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67132 */ #undef WCHAR_TYPE #define WCHAR_TYPE "unsigned int" #undef WCHAR_TYPE_SIZE #define WCHAR_TYPE_SIZE 32 #undef LINK_GCC_C_SEQUENCE_SPEC #define LINK_GCC_C_SEQUENCE_SPEC "%G %L" /* Additional predefined macros. */ #undef TARGET_OS_CPP_BUILTINS #define TARGET_OS_CPP_BUILTINS() \ do { \ builtin_define ("__jehanne__"); \ builtin_assert ("system=jehanne"); \ } while(0);
