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Diffstat (limited to 'nextstep/INSTALL')
| -rw-r--r-- | nextstep/INSTALL | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/nextstep/INSTALL b/nextstep/INSTALL index 326e02a5502..945d67faa47 100644 --- a/nextstep/INSTALL +++ b/nextstep/INSTALL @@ -1,4 +1,4 @@ -Copyright (C) 2008-2017 Free Software Foundation, Inc. +Copyright (C) 2008-2022 Free Software Foundation, Inc. See the end of the file for license conditions. @@ -45,6 +45,35 @@ files will be installed under whatever 'prefix' is set to (defaults to require 'sudo' for "make install"). +Targeting different macOS versions +---------------------------------- + +The Emacs build process automatically enables or disables macOS +features according to the version of macOS it is being built on. It +is possible to override this automatic configuration if you are +targeting a different version of macOS, or wish to build one +executable that is able to enable or disable features at run-time. + +To build a version compatible with an older version of macOS use this +flag: + + -DMAC_OS_X_VERSION_MIN_REQUIRED=x + +and to build for a newer version of macOS: + + -DMAC_OS_X_VERSION_MAX_ALLOWED=x + +For example, to enable run-time checks for features available between +macOS 10.6, and 10.12 inclusive: + + ./configure --with-ns CFLAGS="-DMAC_OS_X_VERSION_MIN_REQUIRED=1060 \ + -DMAC_OS_X_VERSION_MAX_ALLOWED=101200 -g3 -O2" + +The macOS version numbers are formatted as 10x0 for macOS up to 10.10, +and 10xx00 for macOS 10.10 and above. A full list is provided in +/usr/include/AvailabilityMacros.h. + + Installation ------------ |