e1a6fb7870
dependencyClosure { ... searchPath = [ ../foo ../bar ]; ... }
* Primop `dirOf' to return the directory part of a path (e.g., dirOf
/a/b/c == /a/b).
* Primop `relativise' (according to Webster that's a real word!) that
given paths A and B returns a string representing path B relative
path to A; e.g., relativise /a/b/c a/b/x/y => "../x/y".
73 lines
1.9 KiB
Bash
73 lines
1.9 KiB
Bash
. $stdenv/setup
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mainName=$(basename $main | cut -c34-)
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echo "compiling \`$mainName'..."
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# Turn $localIncludes into an array.
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localIncludes=($localIncludes)
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# Determine how many `..' levels appear in the header file references.
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# E.g., if there is some reference `../../foo.h', then we have to
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# insert two extra levels in the directory structure, so that `a.c' is
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# stored at `dotdot/dotdot/a.c', and a reference from it to
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# `../../foo.h' resolves to `dotdot/dotdot/../../foo.h' == `foo.h'.
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n=0
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maxDepth=0
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for ((n = 0; n < ${#localIncludes[*]}; n += 2)); do
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target=${localIncludes[$((n + 1))]}
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# Split the target name into path components using some IFS magic.
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savedIFS="$IFS"
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IFS=/
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components=($target)
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depth=0
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for ((m = 0; m < ${#components[*]}; m++)); do
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c=${components[m]}
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if test "$c" = ".."; then
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depth=$((depth + 1))
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fi
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done
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IFS="$savedIFS"
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if test $depth -gt $maxDepth; then
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maxDepth=$depth;
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fi
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done
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# Create the extra levels in the directory hierarchy.
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prefix=
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for ((n = 0; n < maxDepth; n++)); do
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prefix="dotdot/$prefix"
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done
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# Create symlinks to the header files.
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for ((n = 0; n < ${#localIncludes[*]}; n += 2)); do
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source=${localIncludes[n]}
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target=${localIncludes[$((n + 1))]}
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# Create missing directories. We use IFS magic to split the path
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# into path components.
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savedIFS="$IFS"
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IFS=/
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components=($prefix$target)
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fullPath=(.)
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for ((m = 0; m < ${#components[*]} - 1; m++)); do
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fullPath=("${fullPath[@]}" ${components[m]})
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if ! test -d "${fullPath[*]}"; then
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mkdir "${fullPath[*]}"
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fi
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done
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IFS="$savedIFS"
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ln -sf $source $prefix$target
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done
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# Create a symlink to the main file.
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if ! test "$(readlink $prefix$mainName)" = $main; then
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ln -s $main $prefix$mainName
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fi
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mkdir $out
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test "$prefix" && cd $prefix
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gcc -Wall $cFlags -c $mainName -o $out/$mainName.o
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