Use libjpeg-turbo as a wxWidgets dependecy

Turns out, libjpeg is downloaded over plain HTTP from the official IJG site. It is now replaced with libjpeg-turbo.

cmake-proxies/CMakeLists.txt

@@ -19,14 +19,22 @@ add_conan_lib(
 )
 
 set( wx_zlib "zlib" )
+
 set( wx_png "libpng" )
+set( wx_jpeg "libjpeg-turbo")
+set( wx_tiff "off" )
+
 set( id3tag_zlib "conan" )
 
 if ( ${_OPT}use_zlib STREQUAL "system" )
    set( wx_zlib "sys" )
    # To prevent linking conflicts - we need to use system libpng as well.
    # wxWdigets will attempt to resolve it using find_package
+   find_required_package( PNG "libpng-dev" )
    set( wx_png "sys" )
+   # And, for consistency
+   find_required_package( JPEG "libjpeg-turbo8-dev" )
+   set( wx_jpeg "sys" )
 
    set( id3tag_zlib "system" )
 endif()
@@ -51,7 +59,8 @@ add_conan_lib(
       wxwidgets:expat=${wx_expat}
       wxwidgets:compatibility=3.0
       wxwidgets:png=${wx_png}
-      wxwidgets:tiff=off
+      wxwidgets:jpeg=${wx_jpeg}
+      wxwidgets:tiff=${wx_tiff}
       wxwidgets:secretstore=False
       wxwidgets:opengl=False
       wxwidgets:propgrid=False
@@ -63,6 +72,9 @@ add_conan_lib(
       wxwidgets:html_help=False
       wxwidgets:fs_inet=False
       wxwidgets:protocol=False
+      # Building with SIMD requires a huge number of build dependencies
+      # Probably this will be enabled in the future
+      libjpeg-turbo:SIMD=False 
 )
 
 add_conan_lib(

cmake-proxies/cmake-modules/AudacityDependencies.cmake

@@ -267,3 +267,15 @@ macro( resolve_conan_dependencies )
         include(${f})
     endforeach()
 endmacro()
+
+macro ( find_required_package package_name system_package_name )
+    find_package ( ${package_name} QUIET ${ARGN} )
+
+    if ( NOT ${package_name}_FOUND )
+        if (CMAKE_SYSTEM_NAME MATCHES "Darwin|Windows")
+            message( FATAL_ERROR "Error: ${package_name} is required")
+        else()
+            message( FATAL_ERROR "Error: ${package_name} is required.\nPlease install it with using command like:\n\t\$ sudo apt install ${system_package_name}" )
+        endif()
+    endif()
+endmacro()

linux/build-environment/dependencies.sh

@@ -50,6 +50,7 @@ apt_packages_full_deps=(
     libssl-dev
     libcurl4-openssl-dev
     libpng-dev
+    libjpeg-turbo8-dev
 )
 
 apt-get install -y --no-install-recommends \