1 files changed, 75 insertions, 0 deletions
diff --git a/completions/gcc b/completions/gcc
new file mode 100644
index 0000000..fa95274
--- /dev/null
+++ b/completions/gcc
@@ -0,0 +1,75 @@
+# gcc(1) completion                                        -*- shell-script -*-
+
+_gcc()
+{
+    local cur prev prev2 words cword argument prefix prefix_length
+    _init_completion || return
+
+    # Test that GCC is recent enough and if not fallback to
+    # parsing of --completion option.
+    if ! $1 --completion=" " 2>/dev/null; then
+        if [[ $cur == -* ]]; then
+            local cc=$($1 -print-prog-name=cc1 2>/dev/null)
+            [[ $cc ]] || return
+            COMPREPLY=($(compgen -W "$($cc --help 2>/dev/null | tr '\t' ' ' |
+                command sed -e '/^  *-/!d' -e 's/ *-\([^][ <>]*\).*/-\1/')" \
+                -- "$cur"))
+            [[ ${COMPREPLY-} == *= ]] && compopt -o nospace
+        else
+            _filedir
+        fi
+        return
+    fi
+
+    # extract also for situations like: -fsanitize=add
+    if ((cword > 2)); then
+        prev2="${COMP_WORDS[cword - 2]}"
+    fi
+
+    # sample: -fsan
+    if [[ $cur == -* ]]; then
+        argument=$cur
+        prefix=""
+    # sample: -fsanitize=
+    elif [[ $cur == "=" && $prev == -* ]]; then
+        argument=$prev$cur
+        prefix=$prev$cur
+    # sample: -fsanitize=add
+    elif [[ $prev == "=" && $prev2 == -* ]]; then
+        argument=$prev2$prev$cur
+        prefix=$prev2$prev
+    # sample: --param lto-
+    elif [[ $prev == --param ]]; then
+        argument="$prev $cur"
+        prefix="$prev "
+    fi
+
+    if [[ ! -v argument ]]; then
+        _filedir
+    else
+        # In situation like '-fsanitize=add' $cur is equal to last token.
+        # Thus we need to strip the beginning of suggested option.
+        prefix_length=$((${#prefix} + 1))
+        local flags=$($1 --completion="$argument" | cut -c $prefix_length-)
+        [[ ${flags} == "=*" ]] && compopt -o nospace 2>/dev/null
+        COMPREPLY=($(compgen -W "$flags" -- ""))
+    fi
+} &&
+    complete -F _gcc gcc{,-5,-6,-7,-8} g++{,-5,-6,-7,-8} g77 g95 \
+        gccgo{,-5,-6,-7,-8} gcj gfortran{,-5,-6,-7,-8} gpc &&
+    {
+        cc --version 2>/dev/null | command grep -q GCC ||
+            [[ $(_realcommand cc) == *gcc* ]] &&
+            complete -F _gcc cc || complete -F _minimal cc
+        c++ --version 2>/dev/null | command grep -q GCC ||
+            [[ $(_realcommand c++) == *g++* ]] &&
+            complete -F _gcc c++ || complete -F _minimal c++
+        f77 --version 2>/dev/null | command grep -q GCC ||
+            [[ $(_realcommand f77) == *gfortran* ]] &&
+            complete -F _gcc f77 || complete -F _minimal f77
+        f95 --version 2>/dev/null | command grep -q GCC ||
+            [[ $(_realcommand f95) == *gfortran* ]] &&
+            complete -F _gcc f95 || complete -F _minimal f95
+    }
+
+# ex: filetype=sh