Add libcurl in the list of dependencies

CMakeLists.txt

@@ -52,6 +52,45 @@ ExternalProject_Add (argagg_Project
   CMAKE_ARGS "-DCMAKE_INSTALL_PREFIX:PATH=${CMAKE_BINARY_DIR}"
 )
 
+##########
+## libcurl
+##########
+
+ExternalProject_Add (libcurl_Project
+  URL https://curl.haxx.se/download/curl-7.55.0.tar.xz
+  PREFIX ${CMAKE_BINARY_DIR}
+  CONFIGURE_COMMAND ${CMD} ./configure
+    --prefix=${CMAKE_BINARY_DIR}
+    --disable-shared
+    --enable-static
+    --enable-http
+    --disable-ftp
+    --disable-file
+    --disable-ldap
+    --disable-ldaps
+    --disable-rtsp
+    --disable-proxy
+    --disable-dict
+    --disable-telnet
+    --disable-tftp
+    --disable-pop3
+    --disable-imap
+    --disable-smb
+    --disable-smtp
+    --disable-gopher
+    --disable-manual
+    --disable-libcurl-option
+    --enable-ipv6
+    --disable-sspi
+    --disable-ntlm-wb
+    --disable-unix-socket
+  BUILD_COMMAND ${CMD} make
+  INSTALL_COMMAND ${CMD} make install
+  BUILD_IN_SOURCE 1
+  INSTALL_DIR ${CMAKE_BINARY_DIR}
+  DEPENDS zlib_Project
+)
+
 ###########
 ## libiconv
 ###########
@@ -337,5 +376,5 @@ ExternalProject_Add (planetblupi_Project
              -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
   INSTALL_DIR ${CMAKE_BINARY_DIR}
   BUILD_ALWAYS 1
-  DEPENDS argagg_Project SDL2_Project SDL2_image_Project SDL2_mixer_Project SDL_kitchensink_Project libpng_Project gettext_Project
+  DEPENDS argagg_Project libcurl_Project SDL2_Project SDL2_image_Project SDL2_mixer_Project SDL_kitchensink_Project libpng_Project gettext_Project
 )