| 1 | #! /usr/bin/env bash |
| 2 | |
| 3 | # This script creates a static library (archive). |
| 4 | # It is invoked as: static-library TARGET OS OUTPUT objects* libraries* |
| 5 | # eg: static-library self mingw foo.a /tmp/obj1.o /tmp/obj2.o /lib/libmlton.a |
| 6 | |
| 7 | # A safe fallback for unsupported platforms is: |
| 8 | # rm -f foo.a |
| 9 | # ar rc foo.a /tmp/obj1.o /tmp/obj2.o |
| 10 | # ranlib foo.a |
| 11 | |
| 12 | # However, this script tries to mimic the behaviour of shared libraries as |
| 13 | # closely as possible. It links in the required bits of dependent libraries, |
| 14 | # links together the given objects, and then hides all non-public symbols. |
| 15 | # |
| 16 | # The end result of this process is that two MLton produced static libraries |
| 17 | # can safely be used at the same time since their symbols don't overlap. It |
| 18 | # is even possible to use libraries produced using different versions of the |
| 19 | # runtime. |
| 20 | |
| 21 | set -e |
| 22 | |
| 23 | target="$1" |
| 24 | shift |
| 25 | os="$1" |
| 26 | shift |
| 27 | output="$1" |
| 28 | shift |
| 29 | |
| 30 | if [ "$target" = "self" ]; then target=""; else target="$target-"; fi |
| 31 | |
| 32 | # Change this to false is partial linking does not work on your platform |
| 33 | partialLink='true' |
| 34 | |
| 35 | rm -f "${output}" |
| 36 | |
| 37 | if "$partialLink"; then |
| 38 | # Localize all but export symbols. Platform dependent. |
| 39 | if [ "$os" = "darwin" ]; then |
| 40 | "${target}ld" -r -o "$output.o" "$@" |
| 41 | # The osx linker already makes hidden symbols local |
| 42 | elif [ "$os" = "mingw" -o "$os" = "cygwin" ]; then |
| 43 | # Link allowing _address of stdcall function fixups |
| 44 | # Preserve the export list (.drectve section) |
| 45 | "${target}ld" -r --unique=.drectve --enable-stdcall-fixup -o "$output.o" "$@" |
| 46 | # Extract the list of exports to make only them global |
| 47 | "${target}dlltool" --output-def "$output.def" "$output.o" |
| 48 | grep '@' "$output.def" \ |
| 49 | | sed 's/^[[:space:]]*\([^[:space:]]*\).*$/_\1/' \ |
| 50 | > "$output.globals" |
| 51 | "${target}objcopy" --keep-global-symbols "$output.globals" "$output.o" |
| 52 | rm "$output.def" "$output.globals" |
| 53 | else |
| 54 | "${target}ld" -r -o "$output.o" "$@" |
| 55 | # ELF systems are all the same... localize hidden symbols |
| 56 | # Be careful not to localize gcc PIC's common section thunks |
| 57 | "${target}objdump" -t "$output.o" \ |
| 58 | | grep ' \.hidden ' \ |
| 59 | | grep -v get_pc_thunk \ |
| 60 | | sed 's/^.* \.hidden //' \ |
| 61 | > "$output.locals" |
| 62 | "${target}objcopy" --localize-symbols "$output.locals" "$output.o" |
| 63 | rm "$output.locals" |
| 64 | fi |
| 65 | |
| 66 | # Create the final archive |
| 67 | "${target}ar" rc "$output" "$output.o" |
| 68 | "${target}ranlib" "$output" |
| 69 | rm "$output.o" |
| 70 | else |
| 71 | "${target}ar" rc "$output" "$@" |
| 72 | "${target}ranlib" "$output" |
| 73 | fi |