danielandClaude Fable 5
03d1a1bc2f
The cross toolchain now builds real hosted C++: std::string, vector, unique_ptr, iostreams and exceptions all work in a plain x86_64-montauk-g++ invocation with no special flags. This is the library that native cc1plus will link against for the GCC self-host. crt1 now runs .preinit_array/.init_array before main and hooks .fini_array through atexit (main returns via exit(), so destructors run on both exit paths). Global constructors and libgcc's eh_frame registration both ride this. GCC is reconfigured with --enable-initfini-array (modern arrays instead of .ctors), --with-newlib (satisfies libstdc++'s crossconfig for unknown hosts), --disable-wchar_t and --disable-libstdcxx-pch; the montauk gcc patch grows a hunk keeping os/generic ctype under --with-newlib (the Montauk libc is not newlib). libc additions harvested by the libstdc++ build: mbtowc/wctomb, strxfrm, strtok/strtok_r, a real vfscanf/fscanf/scanf (character- driven with widths and l/ll; also unblocks gprof later), fgetpos/ fsetpos/setbuf/fpos_t, modf plus the C99 float math variants (acosf..tanhf, hypot/hypotf as wrappers), FP_* classification macros, the full POSIX errno vocabulary, complete DT_* dirent types, and mbstate_t. The SDK ships the real libstdc++.a (was an empty stand-in), the C++ headers at 0:/sdk/include/c++, and cxx-test.elf (global ctor, string, vector+sort, unique_ptr, throw/catch; exits 0 on 5/5). Ramdisk sits at 1571 files, within the 2048 table. Co-Authored-By: Claude Fable 5 <[email protected]>
62 lines
2.0 KiB
Diff
62 lines
2.0 KiB
Diff
--- a/config.sub
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+++ b/config.sub
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@@ -1749,7 +1749,7 @@
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| onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
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| midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
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| nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | zephyr* \
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- | fiwix* )
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+ | fiwix* | montauk* )
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;;
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# This one is extra strict with allowed versions
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sco3.2v2 | sco3.2v[4-9]* | sco5v6*)
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--- a/gcc/config.gcc
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+++ b/gcc/config.gcc
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@@ -1935,6 +1935,12 @@
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x86_64-*-elf*)
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tm_file="${tm_file} i386/unix.h i386/att.h elfos.h newlib-stdint.h i386/i386elf.h i386/x86-64.h"
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;;
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+x86_64-*-montauk*)
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+ tm_file="${tm_file} i386/unix.h i386/att.h elfos.h newlib-stdint.h i386/i386elf.h i386/x86-64.h montauk.h"
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+ # The Montauk libc has no stdint.h of its own (programs normally use
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+ # the freestanding kernel headers), so GCC must provide one.
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+ use_gcc_stdint=provide
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+ ;;
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x86_64-*-rtems*)
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tm_file="${tm_file} i386/unix.h i386/att.h elfos.h newlib-stdint.h i386/i386elf.h i386/x86-64.h i386/rtemself.h rtems.h"
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;;
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--- a/libgcc/config.host
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+++ b/libgcc/config.host
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@@ -741,6 +741,10 @@
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i[34567]86-*-elf*)
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tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
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;;
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+x86_64-*-montauk*)
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+ tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
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+ extra_parts="crtbegin.o crtend.o"
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+ ;;
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x86_64-*-elf* | x86_64-*-rtems*)
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tmake_file="$tmake_file i386/t-crtstuff t-crtstuff-pic t-libgcc-pic"
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case ${host} in
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--- a/fixincludes/mkfixinc.sh
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+++ b/fixincludes/mkfixinc.sh
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@@ -20,6 +20,7 @@
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powerpcle-*-eabisim* | \
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powerpcle-*-eabi* | \
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*-*-vxworks7* | \
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+ *-montauk* | \
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*-musl* )
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# IF there is no include fixing,
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# THEN create a no-op fixer and exit
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--- a/libstdc++-v3/configure
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+++ b/libstdc++-v3/configure
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@@ -27340,6 +27340,9 @@
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# on a hosted environment.
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if test "x${with_newlib}" = "xyes"; then
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os_include_dir="os/newlib"
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+ case "${host}" in
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+ *-montauk*) os_include_dir="os/generic" ;; # Montauk libc is not newlib
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+ esac
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$as_echo "#define HAVE_HYPOT 1" >>confdefs.h
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