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-rw-r--r--doc/build-unix.md19
1 files changed, 14 insertions, 5 deletions
diff --git a/doc/build-unix.md b/doc/build-unix.md
index 50c12ebef4..96de098c38 100644
--- a/doc/build-unix.md
+++ b/doc/build-unix.md
@@ -51,18 +51,21 @@ Optional dependencies:
For the versions used in the release, see [release-process.md](release-process.md) under *Fetch and build inputs*.
-System requirements
+Memory Requirements
--------------------
-C++ compilers are memory-hungry. It is recommended to have at least 1 GB of
-memory available when compiling Bitcoin Core. With 512MB of memory or less
-compilation will take much longer due to swap thrashing.
+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:
+
+
+ ./configure CXXFLAGS="--param ggc-min-expand=1 --param ggc-min-heapsize=32768"
Dependency Build Instructions: Ubuntu & Debian
----------------------------------------------
Build requirements:
- sudo apt-get install build-essential libtool autotools-dev autoconf pkg-config libssl-dev libevent-dev bsdmainutils
+ sudo apt-get install build-essential libtool autotools-dev automake pkg-config libssl-dev libevent-dev bsdmainutils
On at least Ubuntu 14.04+ and Debian 7+ there are generic names for the
individual boost development packages, so the following can be used to only
@@ -237,3 +240,9 @@ In this case there is no dependency on Berkeley DB 4.8.
Mining is also possible in disable-wallet mode, but only using the `getblocktemplate` RPC
call not `getwork`.
+
+Additional Configure Flags
+--------------------------
+A list of additional configure flags can be displayed with:
+
+ ./configure --help