Build system: Get sockpp to build on Cygwin

This is probably not the last time this issue needs attention
as it *builds* on Cygwin with these workarounds, but it doesn’t *work*
on Cygwin...

.mingw-cross.cmake

@@ -1,11 +0,0 @@
-set(CMAKE_SYSTEM_NAME Windows)
-set(WIN32 true)
-set(UNIX false)
-
-set(CMAKE_C_COMPILER   x86_64-w64-mingw32-gcc)
-set(CMAKE_CXX_COMPILER x86_64-w64-mingw32-g++)
-
-set(CMAKE_FIND_ROOT_PATH  /usr/x86_64-w64-mingw32)
-set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
-set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
-set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)

scripts/setup_project.sh

@@ -93,12 +93,22 @@ echo "done"
 echo ">>> Building sockpp... "
 pushd dependencies/sockpp-0.7.1/ >/dev/null 2>&1
 if uname -s | tr [:upper:] [:lower:] | grep cygwin >/dev/null; then
-    echo "Adding cygwin workaound for building sockpp."
+    echo "Adding Cygwin workaound for building sockpp."
-    cmake -Bbuild -DCMAKE_TOOLCHAIN_FILE=$PROJECT_BASE_DIR/.mingw-cross.cmake -DSOCKPP_BUILD_SHARED=ON -DSOCKPP_BUILD_STATIC=OFF
+
+    for FILE in "$(find ./ -type f)"; do
+        sed -i -e 's/_WIN32/PLEASE_DO_NOT_DEFINE_THIS_MACRO/g' $FILE
+    done
+    mv ./include/sockpp/socket.h ./include/sockpp/socket.h_original
+    echo '#include <sys/time.h>
+    #include "socket.h_original"' > ./include/sockpp/socket.h
+    sed -i -e 's/SO_REUSEPORT/SO_REUSEADDR/g' ./src/acceptor.cpp
+
+    CFLAGS="-D_XOPEN_SOURCE=700" CXXFLAGS="-D_XOPEN_SOURCE=700" cmake -Bbuild
+    CFLAGS="-D_XOPEN_SOURCE=700" CXXFLAGS="-D_XOPEN_SOURCE=700" cmake --build build
 else
     cmake -Bbuild .
+    cmake --build build
 fi
-cmake --build build
 popd >/dev/null 2>&1
 
 echo ">>> Cleaning up..."