Minor build documentation updates (#2343)

* update fedora required packages

* fix ccache path

* fix formatting

* glibc back compat

doc/build-generic.md

@@ -56,6 +56,8 @@ Please replace `<host>` with your local system's `host-platform-triplet`. The fo
 If you want to cross-compile for another platform, choose the appropriate `<host>` and make sure to build the
 dependencies with the same host before.
 
+If you want to build for the same host but different distro, add `--enable-glibc-back-compat` when calling `./configure`.
+
 
 ccache
 ------
@@ -67,7 +69,7 @@ The default maximum cache size is 5G, which might not be enough to cache multipl
 very often. It is advised to increase the maximum cache size:
 
 ```bash
-$ ./depends/<host>/bin/ccache -M20G
+$ ./depends/<host>/native/bin/ccache -M20G
 ```
 
 Additional Configure Flags

doc/build-unix.md

@@ -10,22 +10,22 @@ Building the dependencies and Dash Core requires some essential build tools and
 
 Run the following commands to install required packages:
 
-#####Debian/Ubuntu:
+##### Debian/Ubuntu:
 ```bash
 $ sudo apt-get install curl build-essential libtool autotools-dev automake pkg-config python3 bsdmainutils cmake
 ```
 
-#####Fedora:
+##### Fedora:
 ```bash
-$ sudo dnf install gcc-c++ libtool make autoconf automake python3 cmake
+$ sudo dnf install gcc-c++ libtool make autoconf automake python3 cmake libstdc++-static patch
 ```
 
-#####Arch Linux
+##### Arch Linux:
 ```bash
 $ pacman -S base-devel python3 cmake
 ```
 
-#####FreeBSD/OpenBSD
+##### FreeBSD/OpenBSD:
 ```bash
 pkg_add gmake cmake libtool
 pkg_add autoconf # (select highest version, e.g. 2.69)