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- #!/bin/sh
- # Output a Makefile rule describing the dependencies of a given source file.
- # Expected arguments are $(CC) $(CFLAGS) $(SRC) $(OBJ)
- set -f
- [ -n "$1" ] && [ -n "$3" ] && [ -n "$4" ] || exit 1
- # Add flags to only perform syntax checking and output a list of included files
- # Discard all output other than included files
- # Convert '\' directory separators to '/'
- # Remove system includes (hack: check for "/Program Files" string in path)
- # Add the source file itself as a dependency
- deps="$($1 $2 -nologo -showIncludes -W0 -Zs "$3" 2>&1 |
- grep '^Note: including file:' |
- sed 's/^Note: including file:[[:space:]]*\(.*\)$/\1/; s/\\/\//g' |
- sed '/\/[Pp]rogram [Ff]iles/d')
- $3"
- # Convert Windows paths to Unix paths if possible
- if command -v cygpath >/dev/null 2>&1 ; then
- IFS='
- '
- deps="$(cygpath -u -- $deps)"
- elif grep -q 'Microsoft' /proc/sys/kernel/osrelease 2>/dev/null ; then
- # Running under WSL. We don't have access to cygpath but since the Windows
- # file system resides under "/mnt/<drive_letter>/" we can simply replace
- # "C:" with "/mnt/c". This command uses a GNU extension to sed but that's
- # available on WSL so we don't need to limit ourselves by what POSIX says.
- deps="$(printf '%s' "$deps" | sed 's/^\([a-zA-Z]\):/\/mnt\/\L\1/')"
- fi
- # Escape characters as required to create valid Makefile file names
- escape() {
- sed 's/ /\\ /g; s/#/\\#/g; s/\$/\$\$/g'
- }
- # Remove prefixes that are equal to the working directory
- # Sort and remove duplicate entries
- # Escape and collapse the dependencies into one line
- deps="$(printf '%s' "$deps" |
- sed "s/^$(pwd | sed 's/\//\\\//g')\///; s/^\.\///" |
- sort | uniq |
- escape | tr -s '\n\r' ' ' | sed 's/^ *\(.*\) $/\1/')"
- # Escape the target file name as well
- target="$(printf '%s' "$4" | escape)"
- printf '%s: %s\n' "$target" "$deps"
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