1 files changed, 61 insertions, 0 deletions
diff --git a/contrib/bug216610/c/gcc.sh b/contrib/bug216610/c/gcc.sh
new file mode 100755
index 0000000..33655d6
--- /dev/null
+++ b/contrib/bug216610/c/gcc.sh
@@ -0,0 +1,61 @@
+#!/bin/bash
+#
+# The Go linker does not seem to know what to do with relative
+# addressing of rodata.* offset from %rip. GCC likes to use this
+# addressing mode on this architecture, so we quickly run into
+# mis-computation when the relative addressing used in a .syso file of
+# symbol located data is resolved to completely the wrong place by the
+# Go (internal) linker.
+#
+# As a workaround for this, we can modify the assembly source code
+# generated by GCC to not point at problematic '.rodata.*' sections,
+# and place this data in the good old '.text' section where Go's
+# linker can make sense of it.
+#
+# This script exists to generate a '.syso' file from some '*.c' files.
+# It works by recognizing the '*.c' command line arguments and
+# converting them into fixed-up '*.s' files. It then performs the
+# compilation for the collection of the '*.s' files. Upon success, it
+# purges the intermediate '*.s' files.
+#
+# The fragile aspect of this present script is which compiler
+# arguments should be used for the compilation from '.c' -> '.s'
+# files. What we do is accumulate arguments until we encounter our
+# first '*.c' file and use those to perform the '.c' -> '.s'
+# compilation. We build up a complete command line for gcc
+# substituting '.s' files for '.c' files in the original command
+# line. Then with the new command line assembled we invoke gcc with
+# those. If that works, we remove all of the intermediate '.s' files.
+
+GCC="${GCC:=gcc}"
+setup=0
+args=()
+final=()
+ses=()
+
+for arg in "$@"; do
+    if [[ "${arg##*.}" = "c" ]]; then
+	setup=1
+	s="${arg%.*}.s"
+	"${GCC}" "${args[@]}" -S -o "${s}" "${arg}"
+	sed -i -e 's/.*\.rodata\..*/\t.text/' "${s}"
+	final+=("${s}")
+	ses+=("${s}")
+    else
+	if [[ $setup -eq 0 ]]; then
+	    args+=("${arg}")
+	fi
+	final+=("${arg}")
+    fi
+done
+
+#echo final: "${final[@]}"
+#echo args: "${args[@]}"
+#echo ses: "${ses[@]}"
+
+"${GCC}" "${final[@]}"
+if [[ $? -ne 0 ]]; then
+    echo "failed to compile"
+    exit 1
+fi
+rm -f "${ses[@]}"