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| author | Alan Third <alan@idiocy.org> | 2018-12-01 13:36:58 +0000 |
|---|---|---|
| committer | Alan Third <alan@idiocy.org> | 2018-12-01 17:14:27 +0000 |
| commit | 317b3547820bf2468c1c0e9b5bed1bde94aeb544 (patch) | |
| tree | 9fbe434072723740233f2d345634b68b4f8ed41d /nextstep/INSTALL | |
| parent | 4b176eb86361cff94a223225e8b852adb1accc50 (diff) | |
| download | emacs-317b3547820bf2468c1c0e9b5bed1bde94aeb544.tar.gz | |
; Add notes about cross-compiling macOS versions
Diffstat (limited to 'nextstep/INSTALL')
| -rw-r--r-- | nextstep/INSTALL | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/nextstep/INSTALL b/nextstep/INSTALL index 64f8f8fcf70..726a897c371 100644 --- a/nextstep/INSTALL +++ b/nextstep/INSTALL @@ -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 ------------ |