Makefile: add a note about the NO_MMAP setting on IRIX and IRIX64

diff --git a/Makefile b/Makefile
index 12defd4c971befd1d1f2648813e6914a93b4431c..532be9dd9a75660377ee3c5c5977259798a2e8f5 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -734,6 +734,7 @@ ifeq ($(uname_S),SunOS)
        NO_MKSTEMPS = YesPlease
        NO_REGEX = YesPlease
        NO_EXTERNAL_GREP = YesPlease
+       THREADED_DELTA_SEARCH = YesPlease
        ifeq ($(uname_R),5.7)
                NEEDS_RESOLV = YesPlease
                NO_IPV6 = YesPlease
@@ -840,11 +841,18 @@ ifeq ($(uname_S),IRIX)
        NO_MEMMEM = YesPlease
        NO_MKSTEMPS = YesPlease
        NO_MKDTEMP = YesPlease
+       # When compiled with the MIPSpro 7.4.4m compiler, and without pthreads
+       # (i.e. NO_PTHREADS is set), and _with_ MMAP (i.e. NO_MMAP is not set),
+       # git dies with a segmentation fault when trying to access the first
+       # entry of a reflog.  The conservative choice is made to always set
+       # NO_MMAP.  If you suspect that your compiler is not affected by this
+       # issue, comment out the NO_MMAP statement.
        NO_MMAP = YesPlease
        NO_EXTERNAL_GREP = UnfortunatelyYes
        SNPRINTF_RETURNS_BOGUS = YesPlease
        SHELL_PATH = /usr/gnu/bin/bash
        NEEDS_LIBGEN = YesPlease
+       THREADED_DELTA_SEARCH = YesPlease
 endif
 ifeq ($(uname_S),IRIX64)
        NO_SETENV=YesPlease
@@ -853,11 +861,18 @@ ifeq ($(uname_S),IRIX64)
        NO_MEMMEM = YesPlease
        NO_MKSTEMPS = YesPlease
        NO_MKDTEMP = YesPlease
+       # When compiled with the MIPSpro 7.4.4m compiler, and without pthreads
+       # (i.e. NO_PTHREADS is set), and _with_ MMAP (i.e. NO_MMAP is not set),
+       # git dies with a segmentation fault when trying to access the first
+       # entry of a reflog.  The conservative choice is made to always set
+       # NO_MMAP.  If you suspect that your compiler is not affected by this
+       # issue, comment out the NO_MMAP statement.
        NO_MMAP = YesPlease
        NO_EXTERNAL_GREP = UnfortunatelyYes
        SNPRINTF_RETURNS_BOGUS = YesPlease
        SHELL_PATH=/usr/gnu/bin/bash
        NEEDS_LIBGEN = YesPlease
+       THREADED_DELTA_SEARCH = YesPlease
 endif
 ifeq ($(uname_S),HP-UX)
        NO_IPV6=YesPlease