fix comment

[lyx.git] / INSTALL

diff --git a/INSTALL b/INSTALL
index ec959ff6a82b7b4ff9f54702400352d0ebcb4e50..63c79198b90c6c0bf18d4495d06a57e27be2ff46 100644 (file)
--- a/INSTALL
+++ b/INSTALL
@@ -71,6 +71,10 @@ libraries. See the RELEASE-NOTES for details.
 Users of debian-based distributions are well advised to run
 'apt-get build-dep lyx' before compiling to install proper dependencies.
 
+Python 3.8 (or newer) must be installed. Python is used for many simple
+tasks that are executed by external scripts, such as the automatic
+configuration step and the import of older LyX documents with the
+lyx2lyx script (this script is called automatically when opening a file).
 
 * Other things to note
 
@@ -79,14 +83,7 @@ translations or you change the translation files themselves (po/*.po)
 files, you will need to have the GNU gettext package installed to
 compile LyX with up-to-date translations (at least gettext version
 0.16.1 is needed). You can get the latest version from:
-       ftp://ftp.gnu.org/gnu/gettext/
-
-The two following programs should be available at configuration time:
-
-  o Python (2.7 or 3.5 and newer) must be installed. Python is used for many
-    simple tasks that are executed by external scripts, such as the automatic
-    configuration step and the import of older LyX documents with the lyx2lyx
-    script (this script is called automatically when opening a file).
+       https://ftp.gnu.org/gnu/gettext/
 
 
 Creating the Makefile
@@ -107,7 +104,7 @@ flags:
     the settings in terms of various options that are described later
 
                       release   prerelease  development profiling gprof
-    optimization        -O2         -O2         -O         -O2     -O2
+    optimization        -O2         -O2         -Og        -O2     -O2
     assertions                       X           X
     stdlib-assertions                            X
     stdlib-debug
@@ -213,10 +210,11 @@ values):
 
   o --enable-optimization=VALUE enables you to set optimization to a
     higher level than the default, for example --enable-optimization=-O3.
+    Default is -Og when debugging is enabled, -O2 otherwise.
 
   o --disable-optimization - you can use this to disable compiler
     optimization of LyX. The compile may be much quicker with some
-    compilers, but LyX will run more slowly.
+    compilers, but LyX will be slower.
 
   o --enable-debug will add debug information to your binary. This
     requires a lot more disk space, but is a must if you want to try
@@ -285,4 +283,3 @@ variable, you have to compile LyX for one architecture at a time in
 the source code directory.  After you have installed LyX for one
 architecture, use `make distclean' before reconfiguring for another
 architecture.
-