cmake, doc: Update build-unix.md

doc/build-unix.md

@@ -8,10 +8,9 @@ To Build
 ---------------------
 
 ```bash
-./autogen.sh
-./configure
-make # use "-j N" for N parallel jobs
-make install # optional
+cmake -B build
+cmake --build build    # use "-j N" for N parallel jobs
+cmake --install build  # optional
 ```
 
 See below for instructions on how to [install the dependencies on popular Linux
@@ -22,19 +21,20 @@ distributions](#linux-distribution-specific-instructions), or the
 
 C++ compilers are memory-hungry. It is recommended to have at least 1.5 GB of
 memory available when compiling Bitcoin Core. On systems with less, gcc can be
-tuned to conserve memory with additional CXXFLAGS:
+tuned to conserve memory with additional `CMAKE_CXX_FLAGS`:
 
 
-    ./configure CXXFLAGS="--param ggc-min-expand=1 --param ggc-min-heapsize=32768"
+    cmake -B build -DCMAKE_CXX_FLAGS="--param ggc-min-expand=1 --param ggc-min-heapsize=32768"
 
-Alternatively, or in addition, debugging information can be skipped for compilation. The default compile flags are
-`-g -O2`, and can be changed with:
+Alternatively, or in addition, debugging information can be skipped for compilation.
+For the default build type `RelWithDebInfo`, the default compile flags are
+`-O2 -g`, and can be changed with:
 
-    ./configure CXXFLAGS="-g0"
+    cmake -B build -DCMAKE_CXX_FLAGS_RELWITHDEBINFO="-O2 -g0"
 
 Finally, clang (often less resource hungry) can be used instead of gcc, which is used by default:
 
-    ./configure CXX=clang++ CC=clang
+    cmake -B build -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_CC_COMPILER=clang
 
 ## Linux Distribution Specific Instructions
 
@@ -44,7 +44,7 @@ Finally, clang (often less resource hungry) can be used instead of gcc, which is
 
 Build requirements:
 
-    sudo apt-get install build-essential libtool autotools-dev automake pkg-config bsdmainutils python3
+    sudo apt-get install build-essential cmake pkg-config bsdmainutils python3
 
 Now, you can either build from self-compiled [depends](#dependencies) or install the required dependencies:
 
@@ -56,12 +56,11 @@ SQLite is required for the descriptor wallet:
 
 Berkeley DB is only required for the legacy wallet. Ubuntu and Debian have their own `libdb-dev` and `libdb++-dev` packages,
 but these will install Berkeley DB 5.3 or later. This will break binary wallet compatibility with the distributed
-executables, which are based on BerkeleyDB 4.8. If you do not care about wallet compatibility, pass
-`--with-incompatible-bdb` to configure. Otherwise, you can build Berkeley DB [yourself](#berkeley-db).
+executables, which are based on BerkeleyDB 4.8. Otherwise, you can build Berkeley DB [yourself](#berkeley-db).
 
 To build Bitcoin Core without wallet, see [*Disable-wallet mode*](#disable-wallet-mode)
 
-Optional port mapping libraries (see: `--with-miniupnpc` and `--with-natpmp`):
+Optional port mapping libraries (see: `-DWITH_MINIUPNPC=ON` and `-DWITH_NATPMP=ON`):
 
     sudo apt install libminiupnpc-dev libnatpmp-dev
 
@@ -77,7 +76,7 @@ GUI dependencies:
 
 If you want to build bitcoin-qt, make sure that the required packages for Qt development
 are installed. Qt 5 is necessary to build the GUI.
-To build without GUI pass `--without-gui`.
+To build with GUI pass `-DBUILD_GUI=ON`.
 
 To build with Qt 5 you need the following:
 
@@ -91,9 +90,6 @@ libqrencode (optional) can be installed with:
 
     sudo apt-get install libqrencode-dev
 
-Once these are installed, they will be found by configure and a bitcoin-qt executable will be
-built by default.
-
 
 ### Fedora
 
@@ -118,7 +114,7 @@ pass `--with-incompatible-bdb` to configure. Otherwise, you can build Berkeley D
 
 To build Bitcoin Core without wallet, see [*Disable-wallet mode*](#disable-wallet-mode)
 
-Optional port mapping libraries (see: `--with-miniupnpc` and `--with-natpmp`):
+Optional port mapping libraries (see: `-DWITH_MINIUPNPC=ON` and `-DWITH_NATPMP=ON`):
 
     sudo dnf install miniupnpc-devel libnatpmp-devel
 
@@ -134,7 +130,7 @@ GUI dependencies:
 
 If you want to build bitcoin-qt, make sure that the required packages for Qt development
 are installed. Qt 5 is necessary to build the GUI.
-To build without GUI pass `--without-gui`.
+To build with GUI pass `-DBUILD_GUI=ON`.
 
 To build with Qt 5 you need the following:
 
@@ -171,9 +167,7 @@ and configure using the following:
 ```bash
 export BDB_PREFIX="/path/to/bitcoin/depends/x86_64-pc-linux-gnu"
 
-./configure \
-    BDB_LIBS="-L${BDB_PREFIX}/lib -ldb_cxx-4.8" \
-    BDB_CFLAGS="-I${BDB_PREFIX}/include"
+cmake -B build -DBerkeleyDB_INCLUDE_DIR:PATH="${BDB_PREFIX}/include"
 ```
 
 **Note**: Make sure that `BDB_PREFIX` is an absolute path.
@@ -185,7 +179,7 @@ Disable-wallet mode
 When the intention is to only run a P2P node, without a wallet, Bitcoin Core can
 be compiled in disable-wallet mode with:
 
-    ./configure --disable-wallet
+    cmake -B build -DENABLE_WALLET=OFF
 
 In this case there is no dependency on SQLite or Berkeley DB.
 
@@ -195,19 +189,19 @@ Additional Configure Flags
 --------------------------
 A list of additional configure flags can be displayed with:
 
-    ./configure --help
+    cmake -B build -LH
 
 
 Setup and Build Example: Arch Linux
 -----------------------------------
 This example lists the steps necessary to setup and build a command line only distribution of the latest changes on Arch Linux:
 
-    pacman --sync --needed autoconf automake boost gcc git libevent libtool make pkgconf python sqlite
+    pacman --sync --needed cmake boost gcc git libevent make pkgconf python sqlite
     git clone https://github.com/bitcoin/bitcoin.git
     cd bitcoin/
-    ./autogen.sh
-    ./configure
-    make check
-    ./src/bitcoind
+    cmake -B build
+    cmake --build build
+    ctest --test-dir build
+    ./build/src/bitcoind
 
 If you intend to work with legacy Berkeley DB wallets, see [Berkeley DB](#berkeley-db) section.