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feat: native GCC - cc1, cc1plus and the gcc driver run on MontaukOS

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Cross-build GCC 14.2.0 with --host=x86_64-montauk: the driver, cc1,
cc1plus and collect2 now link as static Montauk ET_EXEC binaries
against the hosted libstdc++, and ship in the SDK. Together with the
native binutils, TCC and the target sysroot, MontaukOS carries a
complete self-contained C and C++ toolchain at 0:/sdk.

libc: anonymous mmap/munmap over SYS_ALLOC (GCC's page allocator
wants mmap; SYS_ALLOC memory is page-aligned by construction),
getpagesize, minimal sysconf, MB_CUR_MAX, isascii/toascii, POSIX id
typedefs (ino_t, dev_t, nlink_t, ...), struct stat fields switched to
proper POSIX types (st_size is a signed off_t now), and a
conventional _STDIO_H guard marker so GMP's FILE detection works.

Build recipe and the five host-build gotchas (bundled config.subs,
gettext removal, stdio guard sniffing, endianness cache preset,
sysroot sdk symlink) are documented in toolchain/README.md. The
devkit stages the driver as gcc.elf/g++.elf/cpp.elf, the backends in
the libexec layout the driver expects, a copy of ld where collect2
searches, and a 0:/tmp scratch dir. Ramdisk: 1604 files, 368 MB.

Co-Authored-By: Claude Fable 5 <[email protected]>
This commit is contained in:
daniel
2026-07-16 23:51:30 +02:00
co-authored by Claude Fable 5
parent 03d1a1bc2f
commit f234c67a2b
13 changed files with 195 additions and 17 deletions
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programs/include/libc/unistd.h
+8
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@@ -39,6 +39,14 @@ int execve(const char *path, char *const argv[], char *const envp[]);
int execvp(const char *file, char *const argv[]);
int pipe(int fds[2]);
long pathconf(const char *path, int name);
int getpagesize(void);
long sysconf(int name);
/* sysconf() names (Linux numbering). */
#define _SC_OPEN_MAX 4
#define _SC_PAGESIZE 30
#define _SC_PAGE_SIZE 30
#define _SC_NPROCESSORS_ONLN 84
/* pathconf() names (Linux numbering). */
#define _PC_LINK_MAX 0