diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index 94c6f32..e56bf8b 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -346,7 +346,7 @@ jobs:
     - name: Build libcurl
       run: |
         cd external/src/curl
-        cmake . -DCMAKE_C_FLAGS="-Os" -DBUILD_CURL_EXE=OFF -DBUILD_SHARED_LIBS=OFF -DCURL_ZLIB=OFF -DCURL_DISABLE_ALTSVC=ON -DCURL_DISABLE_COOKIES=ON -DCURL_DISABLE_DOH=ON -DCURL_DISABLE_GETOPTIONS=ON -DCURL_DISABLE_HSTS=ON -DCURL_DISABLE_LIBCURL_OPTION=ON -DCURL_DISABLE_MIME=ON -DCURL_DISABLE_NETRC=ON -DCURL_DISABLE_NTLM=ON -DCURL_DISABLE_PARSEDATE=ON -DCURL_DISABLE_PROGRESS_METER=ON -DCURL_DISABLE_SHUFFLE_DNS=ON -DCURL_DISABLE_SOCKETPAIR=ON -DCURL_DISABLE_VERBOSE_STRINGS=ON -DHTTP_ONLY=ON -DCURL_ENABLE_SSL=OFF -DUSE_LIBIDN2=OFF -DCURL_USE_LIBPSL=OFF -DCURL_USE_LIBSSH2=OFF -DENABLE_UNIX_SOCKETS=OFF
+        cmake . -DCMAKE_C_FLAGS="-Os -flto" -DBUILD_CURL_EXE=OFF -DBUILD_SHARED_LIBS=OFF -DCURL_ZLIB=OFF -DCURL_DISABLE_ALTSVC=ON -DCURL_DISABLE_COOKIES=ON -DCURL_DISABLE_DOH=ON -DCURL_DISABLE_GETOPTIONS=ON -DCURL_DISABLE_HSTS=ON -DCURL_DISABLE_LIBCURL_OPTION=ON -DCURL_DISABLE_MIME=ON -DCURL_DISABLE_NETRC=ON -DCURL_DISABLE_NTLM=ON -DCURL_DISABLE_PARSEDATE=ON -DCURL_DISABLE_PROGRESS_METER=ON -DCURL_DISABLE_SHUFFLE_DNS=ON -DCURL_DISABLE_SOCKETPAIR=ON -DCURL_DISABLE_VERBOSE_STRINGS=ON -DHTTP_ONLY=ON -DCURL_ENABLE_SSL=OFF -DUSE_LIBIDN2=OFF -DCURL_USE_LIBPSL=OFF -DCURL_USE_LIBSSH2=OFF -DENABLE_UNIX_SOCKETS=OFF
         make -j3
         cd lib && mkdir .libs && cp libcurl.a .libs
 
@@ -355,7 +355,7 @@ jobs:
         cd external/src/libuv
         mkdir build
         cd build
-        cmake .. -DCMAKE_C_FLAGS='-Os' -DBUILD_TESTING=OFF
+        cmake .. -DCMAKE_C_FLAGS='-Os -flto' -DBUILD_TESTING=OFF
         make -j3
 
     - name: Build libzmq
@@ -363,14 +363,14 @@ jobs:
         cd external/src/libzmq
         mkdir build
         cd build
-        cmake .. -DCMAKE_C_FLAGS='-Os' -DCMAKE_CXX_FLAGS='-Os' -DWITH_LIBSODIUM=OFF -DWITH_LIBBSD=OFF -DBUILD_TESTS=OFF -DWITH_DOCS=OFF -DENABLE_DRAFTS=OFF -DWITH_PERF_TOOL=OFF
+        cmake .. -DCMAKE_C_FLAGS='-Os -flto' -DCMAKE_CXX_FLAGS='-Os -flto' -DWITH_LIBSODIUM=OFF -DWITH_LIBBSD=OFF -DBUILD_TESTS=OFF -DWITH_DOCS=OFF -DENABLE_DRAFTS=OFF -DWITH_PERF_TOOL=OFF
         make -j3
 
     - name: Build p2pool
       run: |
         mkdir build
         cd build
-        cmake .. -DSTATIC_BINARY=ON
+        cmake .. -DCMAKE_C_FLAGS='-flto' -DCMAKE_CXX_FLAGS='-flto' -DSTATIC_LIBS=ON
         make -j3
 
     - name: Build tests
@@ -378,7 +378,7 @@ jobs:
         cd tests
         mkdir build
         cd build
-        cmake .. -DSTATIC_LIBS=ON
+        cmake .. -DCMAKE_C_FLAGS='-flto' -DCMAKE_CXX_FLAGS='-flto' -DSTATIC_LIBS=ON
         make -j3
 
     - name: Run tests
@@ -476,28 +476,28 @@ jobs:
         run: |
           sudo pkg install -y cmake
           cd external/src/curl
-          cmake . -DCMAKE_C_FLAGS="-Os" -DBUILD_CURL_EXE=OFF -DBUILD_SHARED_LIBS=OFF -DCURL_ZLIB=OFF -DCURL_DISABLE_ALTSVC=ON -DCURL_DISABLE_COOKIES=ON -DCURL_DISABLE_DOH=ON -DCURL_DISABLE_GETOPTIONS=ON -DCURL_DISABLE_HSTS=ON -DCURL_DISABLE_LIBCURL_OPTION=ON -DCURL_DISABLE_MIME=ON -DCURL_DISABLE_NETRC=ON -DCURL_DISABLE_NTLM=ON -DCURL_DISABLE_PARSEDATE=ON -DCURL_DISABLE_PROGRESS_METER=ON -DCURL_DISABLE_SHUFFLE_DNS=ON -DCURL_DISABLE_SOCKETPAIR=ON -DCURL_DISABLE_VERBOSE_STRINGS=ON -DHTTP_ONLY=ON -DCURL_ENABLE_SSL=OFF -DUSE_LIBIDN2=OFF -DCURL_USE_LIBPSL=OFF -DCURL_USE_LIBSSH2=OFF -DENABLE_UNIX_SOCKETS=OFF
+          cmake . -DCMAKE_C_FLAGS="-Os -flto" -DBUILD_CURL_EXE=OFF -DBUILD_SHARED_LIBS=OFF -DCURL_ZLIB=OFF -DCURL_DISABLE_ALTSVC=ON -DCURL_DISABLE_COOKIES=ON -DCURL_DISABLE_DOH=ON -DCURL_DISABLE_GETOPTIONS=ON -DCURL_DISABLE_HSTS=ON -DCURL_DISABLE_LIBCURL_OPTION=ON -DCURL_DISABLE_MIME=ON -DCURL_DISABLE_NETRC=ON -DCURL_DISABLE_NTLM=ON -DCURL_DISABLE_PARSEDATE=ON -DCURL_DISABLE_PROGRESS_METER=ON -DCURL_DISABLE_SHUFFLE_DNS=ON -DCURL_DISABLE_SOCKETPAIR=ON -DCURL_DISABLE_VERBOSE_STRINGS=ON -DHTTP_ONLY=ON -DCURL_ENABLE_SSL=OFF -DUSE_LIBIDN2=OFF -DCURL_USE_LIBPSL=OFF -DCURL_USE_LIBSSH2=OFF -DENABLE_UNIX_SOCKETS=OFF
           make -j2
           cd lib && mkdir .libs && cp libcurl.a .libs
           cd ../../libuv
           mkdir build
           cd build
-          cmake .. -DCMAKE_C_FLAGS='-Os' -DBUILD_TESTING=OFF
+          cmake .. -DCMAKE_C_FLAGS='-Os -flto' -DBUILD_TESTING=OFF
           make -j2
           cd ../../libzmq
           mkdir build
           cd build
-          cmake .. -DCMAKE_C_FLAGS='-Os' -DCMAKE_CXX_FLAGS='-Os' -DWITH_LIBSODIUM=OFF -DWITH_LIBBSD=OFF -DBUILD_TESTS=OFF -DWITH_DOCS=OFF -DENABLE_DRAFTS=OFF -DWITH_PERF_TOOL=OFF
+          cmake .. -DCMAKE_C_FLAGS='-Os -flto' -DCMAKE_CXX_FLAGS='-Os -flto' -DWITH_LIBSODIUM=OFF -DWITH_LIBBSD=OFF -DBUILD_TESTS=OFF -DWITH_DOCS=OFF -DENABLE_DRAFTS=OFF -DWITH_PERF_TOOL=OFF
           make -j2
           cd ../../../..
           mkdir build
           cd build
-          cmake .. -DSTATIC_BINARY=ON
+          cmake .. -DCMAKE_C_FLAGS='-flto' -DCMAKE_CXX_FLAGS='-flto' -DSTATIC_LIBS=ON
           make -j2
           cd ../tests
           mkdir build
           cd build
-          cmake .. -DSTATIC_LIBS=ON
+          cmake .. -DCMAKE_C_FLAGS='-flto' -DCMAKE_CXX_FLAGS='-flto' -DSTATIC_LIBS=ON
           make -j2
           gunzip *.gz
           ./p2pool_tests