mirror of https://github.com/upx/upx.git
128 lines
4.0 KiB
Bash
Executable File
128 lines
4.0 KiB
Bash
Executable File
#! /bin/sh
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## vim:set ts=4 sw=4 et:
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set -e
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#
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# build UPX "by hand", using a POSIX-compliant shell and
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# a minimal number of compilation flags
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# Copyright (C) Markus Franz Xaver Johannes Oberhumer
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#
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# uses optional environment variables: AR, CC, CXX, OPTIMIZE, top_srcdir
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# shell init
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### set -x # enable logging
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DUALCASE=1; export DUALCASE # for MKS sh
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test -n "${ZSH_VERSION+set}" && emulate sh # for zsh
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my_argv0="$0"
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# toolchain settings and compilation flags
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AR="${AR:-ar}"
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CC="${CC:-cc}"
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CXX="${CXX:-c++ -std=gnu++17}"
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# HINT: use "export AR=false" if "$AR rcs" does not work on your system; see below
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if test "x$AR" = "x0" || test "x$AR" = "xfalse" || test "x$AR" = "x/bin/false"; then
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AR="" # do not use $AR
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fi
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# protect against security threats caused by misguided compiler "optimizations"
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mandatory_flags="-fno-strict-aliasing -fno-strict-overflow -funsigned-char"
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if test "x$OPTIMIZE" != "x" && test "x$OPTIMIZE" != "x0"; then
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# not mandatory and not minimal, but usually a good idea:
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mandatory_flags="-Wall -O2 $mandatory_flags"
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fi
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CC="$CC $mandatory_flags"
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CXX="$CXX $mandatory_flags"
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# go to upx top-level directory
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# HINT: set "top_srcdir" manually if your system does not have "readlink"
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if test "x$top_srcdir" = "x"; then
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my_argv0abs="$(readlink -fn "$my_argv0")"
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test "x$my_argv0abs" = "x" && exit 1
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my_argv0dir="$(dirname "$my_argv0abs")"
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test "x$my_argv0dir" = "x" && exit 1
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cd "$my_argv0dir/../.." || exit 1
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else
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cd "$top_srcdir" || exit 1
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fi
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top_srcdir="$(pwd)" # absolute
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rel_top_srcdir=. # relative top_srcdir
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echo "# current directory: '$(pwd)'"
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test -f doc/upx.pod || exit 1 # sanity check
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test -f src/version.h || exit 1 # sanity check
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rm -rf ./build/by-hand # WARNING: existing build-directory gets deleted!
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# helper function
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run() {
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if test 0 = 1; then
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# DEBUG dry-run: print command, but don't actually run unless $1 is "+"
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if test "x$1" = "x+"; then
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shift; echo "$@"; "$@"; return
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fi
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shift; echo "$@"; return
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fi
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# print short info and run command
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test "x$1" != "x" && test "x$1" != "x+" && echo "$1"
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shift; "$@"
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}
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# helper function
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check_submodule() {
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#local ff # "local" seems unsupported by some versions of ksh
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for ff in COPYING LICENSE LICENSE.txt; do
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if test -f "$rel_top_srcdir/vendor/$1/$ff"; then
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# create and enter build directory; updates global $rel_top_srcdir
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run "+" cd "$rel_top_srcdir" || exit 1
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rel_top_srcdir=.
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echo "#==== build $1 ====="
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run "+" mkdir "build/by-hand/$1"
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run "+" cd "build/by-hand/$1" || exit 1
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rel_top_srcdir=../../..
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return 0
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fi
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done
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return 1
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}
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# build
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run "+" mkdir -p "build/by-hand"
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if check_submodule bzip2; then
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for f in "$rel_top_srcdir"/vendor/bzip2/*.c; do
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run "CC $f" $CC -c "$f"
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done
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fi
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if check_submodule ucl; then
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for f in "$rel_top_srcdir"/vendor/ucl/src/*.c; do
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run "CC $f" $CC -I"$rel_top_srcdir"/vendor/ucl/include -I"$rel_top_srcdir"/vendor/ucl -c "$f"
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done
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fi
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if check_submodule zlib; then
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for f in "$rel_top_srcdir"/vendor/zlib/*.c; do
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run "CC $f" $CC -DHAVE_UNISTD_H -DHAVE_VSNPRINTF -c "$f"
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done
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fi
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if check_submodule zstd; then
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for f in "$rel_top_srcdir"/vendor/zstd/lib/*/*.c; do
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run "CC $f" $CC -DDYNAMIC_BMI2=0 -DZSTD_DISABLE_ASM -c "$f"
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done
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fi
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run "+" cd "$rel_top_srcdir" || exit 1
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rel_top_srcdir=.
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echo "#==== build UPX ====="
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run "+" cd "build/by-hand" || exit 1
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rel_top_srcdir=../..
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for f in "$rel_top_srcdir"/src/*.cpp "$rel_top_srcdir"/src/*/*.cpp; do
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run "CXX $f" $CXX -I"$rel_top_srcdir"/vendor -c "$f"
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done
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# echo "#==== link UPX ====="
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if test "x$AR" = "x"; then
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# link without using $AR
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run "CXX upx" $CXX -o upx *.o */*.o
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else
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run "AR libupx" $AR rcs libupx_submodules.a */*.o
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run "CXX upx" $CXX -o upx *.o -L. -lupx_submodules
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fi
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echo "# current directory: '$(pwd)'"
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ls -l upx*
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echo "# All done."
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