nsz Git - musl/blob - tools/gen-musl-gcc.sh

   1 #!/bin/sh
   2
   3 printf '#!/bin/sh\n\nlibc_prefix="%s"\nldso_pathname="%s"\n' "$1" "$2"
   4
   5 cat <<"EOF"
   6 gcc=gcc
   7 libc_lib=$libc_prefix/lib
   8 libc_inc=$libc_prefix/include
   9 libc_crt="$libc_lib/crt1.o"
  10 libc_start="$libc_lib/crti.o"
  11 libc_end="$libc_lib/crtn.o"
  12
  13 gcc_inc=$libc_inc
  14 libgcc="$("$gcc" -print-file-name=libgcc.a)"
  15 libgcc=${libgcc%/libgcc.a}
  16
  17 gccver=${libgcc##*/}
  18 gcctarget=${libgcc%/*}
  19 gcctarget=${gcctarget##*/}
  20
  21 case "$gccver" in
  22 [0123].*|4.[01]*) ;;
  23 *) nosp=-fno-stack-protector ;;
  24 esac
  25
  26 [ "x$1" = "x-V" ] && { printf "%s: -V not supported\n" "$0" ; exit 1 ; }
  27
  28 for i ; do
  29 case "$skip$i" in
  30 -I|-L) skip=--- ; continue ;;
  31 -[cSE]|-M*) nolink=1 ;;
  32 -shared) nocrt=1 ;;
  33 -*) ;;
  34 *) havefile=1 ;;
  35 esac
  36 skip=
  37 done
  38
  39 [ "$havefile" ] || nolink=1
  40
  41 [ "$nolink" ] && nocrt=1
  42
  43 [ "$nocrt" ] || set -- "$libc_start" "$libc_crt" "$@" "$libc_end" \
  44
  45 [ "$nolink" ] || {
  46 tmp_specs=$HOME/.specs.tmp.$$
  47 printf '*link_libgcc:\n\n\n' > "$tmp_specs" || exit 1
  48 exec 3<"$tmp_specs"
  49 rm -f "$tmp_specs"
  50 set -- -specs=/proc/self/fd/3 "$@" \
  51   -Wl,--as-needed -Wl,--start-group -lc -lgcc -lgcc_eh -Wl,--end-group \
  52   -Wl,-dynamic-linker,"$ldso_pathname" -Wl,-nostdlib
  53 }
  54
  55 set -- -std=gnu99 -nostdinc -nostdlib $nosp \
  56   -isystem "$libc_inc" -isystem "$gcc_inc" "$@" \
  57   -L"$libc_lib" -L"$libgcc"
  58
  59 exec "$gcc" "$@"
  60 EOF