Doc: Add ccache to README.md and Brewfile

1 files changed, 10 insertions, 3 deletions

diff --git a/README.md b/README.md
index 22114aa18..a10c14f8d 100644
--- a/README.md
+++ b/README.md
@@ -176,6 +176,7 @@ library archives (`.a`).
 | ldns         | 1.6.17        | NO       | `libldns-dev`        | `ldns`       | `libldns-devel`    | `ldns-devel`        | YES      | SSL toolkit     |
 | expat        | 1.1           | NO       | `libexpat1-dev`      | `expat`      | `expat-devel`      | `expat-devel`       | YES      | XML parsing     |
 | GTest        | 1.5           | YES      | `libgtest-dev`[1]    | `gtest`      | `gtest-devel`      | `gtest-devel`       | YES      | Test suite      |
+| ccache       | any           | NO       | `ccache`             | `ccache`     | `ccache`           | `ccache`            | YES      | Compil. cache   |
 | Doxygen      | any           | NO       | `doxygen`            | `doxygen`    | `doxygen`          | `doxygen`           | YES      | Documentation   |
 | Graphviz     | any           | NO       | `graphviz`           | `graphviz`   | `graphviz`         | `graphviz`          | YES      | Documentation   |
 | lrelease     | ?             | NO       | `qttools5-dev-tools` | `qt5-tools`  | `qt5-tools`        | `qt5-linguist`      | YES      | Translations    |
@@ -183,7 +184,7 @@ library archives (`.a`).
 | libusb       | ?             | NO       | `libusb-1.0-0-dev`   | `libusb`     | `libusb-devel`     | `libusbx-devel`     | YES      | Hardware wallet |
 | libprotobuf  | ?             | NO       | `libprotobuf-dev`    | `protobuf`   | `protobuf-devel`   | `protobuf-devel`    | YES      | Hardware wallet |
 | protoc       | ?             | NO       | `protobuf-compiler`  | `protobuf`   | `protobuf`         | `protobuf-compiler` | YES      | Hardware wallet |
-| libudev      | ?             | No       | `libudev-dev`        | `systemd`    | `eudev-libudev-devel` | `systemd-devel`     | YES      | Hardware wallet |
+| libudev      | ?             | No       | `libudev-dev`        | `systemd`    | `eudev-libudev-devel` | `systemd-devel`  | YES      | Hardware wallet |
 
 [1] On Debian/Ubuntu `libgtest-dev` only includes sources and headers. You must
 build the library binary manually. This can be done with the following command ```sudo apt-get install libgtest-dev && cd /usr/src/gtest && sudo cmake . && sudo make && sudo mv libg* /usr/lib/ ```
@@ -191,11 +192,11 @@ build the library binary manually. This can be done with the following command `
 
 Install all dependencies at once on Debian/Ubuntu:
 
-``` sudo apt update && sudo apt install build-essential cmake pkg-config libssl-dev libzmq3-dev libunbound-dev libsodium-dev libunwind8-dev liblzma-dev libreadline6-dev libldns-dev libexpat1-dev libpgm-dev qttools5-dev-tools libhidapi-dev libusb-1.0-0-dev libprotobuf-dev protobuf-compiler libudev-dev libboost-chrono-dev libboost-date-time-dev libboost-filesystem-dev libboost-locale-dev libboost-program-options-dev libboost-regex-dev libboost-serialization-dev libboost-system-dev libboost-thread-dev doxygen graphviz ```
+``` sudo apt update && sudo apt install build-essential cmake pkg-config libssl-dev libzmq3-dev libunbound-dev libsodium-dev libunwind8-dev liblzma-dev libreadline6-dev libldns-dev libexpat1-dev libpgm-dev qttools5-dev-tools libhidapi-dev libusb-1.0-0-dev libprotobuf-dev protobuf-compiler libudev-dev libboost-chrono-dev libboost-date-time-dev libboost-filesystem-dev libboost-locale-dev libboost-program-options-dev libboost-regex-dev libboost-serialization-dev libboost-system-dev libboost-thread-dev ccache doxygen graphviz ```
 
 Install all dependencies at once on openSUSE:
 
-``` sudo zypper ref && sudo zypper in cppzmq-devel  ldns-devel libboost_chrono-devel libboost_date_time-devel libboost_filesystem-devel libboost_locale-devel libboost_program_options-devel libboost_regex-devel libboost_serialization-devel libboost_system-devel libboost_thread-devel libexpat-devel libminiupnpc-devel libsodium-devel libunwind-devel unbound-devel  cmake doxygen fdupes gcc-c++ libevent-devel libopenssl-devel pkgconf-pkg-config readline-devel  xz-devel libqt5-qttools-devel patterns-devel-C-C++-devel_C_C++```
+``` sudo zypper ref && sudo zypper in cppzmq-devel  ldns-devel libboost_chrono-devel libboost_date_time-devel libboost_filesystem-devel libboost_locale-devel libboost_program_options-devel libboost_regex-devel libboost_serialization-devel libboost_system-devel libboost_thread-devel libexpat-devel libminiupnpc-devel libsodium-devel libunwind-devel unbound-devel  cmake doxygen ccache fdupes gcc-c++ libevent-devel libopenssl-devel pkgconf-pkg-config readline-devel  xz-devel libqt5-qttools-devel patterns-devel-C-C++-devel_C_C++```
 
 Install all dependencies at once on macOS with the provided Brewfile:
 ``` brew update && brew bundle --file=contrib/brew/Brewfile ```
@@ -274,6 +275,12 @@ Dependencies need to be built with -fPIC. Static libraries usually aren't, so yo
     HAVE_DOT=YES doxygen Doxyfile
     ```
 
+* **Optional**: use ccache not to rebuild translation units, that haven't really changed. Monero's CMakeLists.txt file automatically handles it
+
+    ```bash
+    sudo apt install ccache
+    ```
+
 #### On the Raspberry Pi
 
 Tested on a Raspberry Pi Zero with a clean install of minimal Raspbian Stretch (2017-09-07 or later) from https://www.raspberrypi.org/downloads/raspbian/. If you are using Raspian Jessie, [please see note in the following section](#note-for-raspbian-jessie-users).