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90c4ef1f7d
build-aux/gen-single-binary.sh (override_single): A new function to refactor the existing mappings for dir, vdir, and arch. This function now also sets the DEPENDENCIES variable so that these dependencies can be maintained later in the script, where we now propagate the automake generated $(src_$cmd_DEPENDENCIES) to our equivalent src_libsinglebin_$cmd_a_DEPENDENCIES. This will ensure that any required libs are built, which we require in a following change to cksum that builds part of it as a separate library.
119 lines
3.6 KiB
Bash
Executable File
119 lines
3.6 KiB
Bash
Executable File
#!/bin/sh
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# Generate the list of rules for the single-binary option based on all the other
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# binaries found in src/local.mk.
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#
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# We need to duplicate the specific rules to build each program into a new
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# static library target. We can't reuse the existing target since we need to
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# create a .a file instead of linking the program. We can't do this at
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# ./configure since the file names need to be available when automake runs
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# to let it generate all the required rules in Makefile.in. The configure
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# step will select which ones will be used to build, but they need to be
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# generated beforehand.
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#
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# Instead of maintaining a duplicated list of rules, we generate the
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# single-binary required rules based on the normal configuration found on
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# src/local.mk with this script.
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if test "x$1" = "x"; then
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echo "Usage: $0 path/to/src/local.mk" >&2
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exit 1
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fi
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set -e
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LOCAL_MK=$1
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GEN_LISTS_OF_PROGRAMS="`dirname "$0"`/gen-lists-of-programs.sh"
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ALL_PROGRAMS=$($GEN_LISTS_OF_PROGRAMS --list-progs \
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| grep -v -F -e coreutils -e libstdbuf.so \
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| tr '[' '_')
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# Compute default SOURCES. automake will assume the source file for the
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# src_${cmd} target to be src/${cmd}.c, but we will add rules to generate
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# the lib src_libsinglebin_${cmd}_a which won't match the autogenerated source
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# file. This loop will initialize the default source file and will be reset
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# later if needed.
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for cmd in $ALL_PROGRAMS; do
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eval "src_${cmd}_SOURCES=src/${cmd}.c"
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done
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# Load actual values from src/local.mk. This will read all the variables from
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# the local.mk matching the src_${cmd}_... case.
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while read l; do
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if echo "$l" | grep -E '^src_\w+ +\+?=' > /dev/null; then
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var=$(echo $l | cut -f 1 -d ' ')
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value=$(echo $l | cut -f 2- -d =)
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if [ "$value" != " \$(LDADD)" ]; then
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oldvalue=""
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if echo $l | grep -F '+=' >/dev/null; then
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eval "oldvalue=\${$var}"
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fi
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value=$(echo "$value" | sed "s/'/'\"'\"'/g")
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eval "$var='$oldvalue "$value"'"
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fi
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fi
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done < $LOCAL_MK
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me=`echo "$0" | sed 's,.*/,,'`
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echo "## Automatically generated by $me. DO NOT EDIT BY HAND!"
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# Override the sources for some tools, to use smaller variants
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override_single() {
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from="$1"; to="$2";
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eval "src_${from}_SOURCES='src/coreutils-${from}.c'"
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eval "src_from_LDADD=\$src_${from}_LDADD"
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eval "src_${from}_LDADD='$src_from_LDADD src/libsinglebin_${to}.a'"
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eval "src_libsinglebin_${from}_a_DEPENDENCIES='src/libsinglebin_${to}.a'"
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echo "src_libsinglebin_${from}_a_DEPENDENCIES = src/libsinglebin_${to}.a"
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}
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override_single dir ls
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override_single vdir ls
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override_single arch uname
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for cmd in $ALL_PROGRAMS; do
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echo "# Command $cmd"
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echo noinst_LIBRARIES += src/libsinglebin_${cmd}.a
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base="src_libsinglebin_${cmd}_a"
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# SOURCES
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var=src_${cmd}_SOURCES
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eval "value=\$$var"
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echo "${base}_SOURCES = $value"
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# LDADD
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var=src_${cmd}_LDADD
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eval "value=\$$var"
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if [ "x$value" != "x" ]; then
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echo "${base}_ldadd = $value"
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fi
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# DEPENDENCIES
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var=src_libsinglebin_${cmd}_a_DEPENDENCIES
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eval "value=\$$var"
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if [ "x$value" = "x" ]; then
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echo "$var = \$(src_${cmd}_DEPENDENCIES)"
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fi
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# CFLAGS
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# Hack any other program defining a main() replacing its main by
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# single_binary_main_$PROGRAM_NAME.
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echo "${base}_CFLAGS = \"-Dmain=single_binary_main_${cmd} (int, char **);" \
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" int single_binary_main_${cmd}\" " \
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"-Dusage=_usage_${cmd} \$(src_coreutils_CFLAGS)"
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var=src_${cmd}_CFLAGS
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eval "value=\$$var"
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if [ "x$value" != "x" ]; then
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echo "${base}_CFLAGS += $value"
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fi
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# CPPFLAGS
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var=src_${cmd}_CPPFLAGS
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eval "value=\$$var"
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if [ "x$value" != "x" ]; then
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echo "${base}_CPPFLAGS = $value"
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fi
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done
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exit 0
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