Merge branch 'rj/build-tweaks'

Various build tweaks, including CSPRNG selection on some platforms.

* rj/build-tweaks:
  config.mak.uname: set CSPRNG_METHOD to getrandom on Linux
  config.mak.uname: add arc4random to the cygwin build
  config.mak.uname: add sysinfo() configuration for cygwin
  builtin/gc.c: correct RAM calculation when using sysinfo
  config.mak.uname: add clock_gettime() to the cygwin build
  config.mak.uname: add HAVE_GETDELIM to the cygwin section
  config.mak.uname: only set NO_REGEX on cygwin for v1.7
  config.mak.uname: add a note about NO_STRLCPY for Linux
  Makefile: remove NEEDS_LIBRT build variable
  meson.build: set default help format to html on windows
  meson.build: only set build variables for non-default values
  Makefile: only set some BASIC_CFLAGS when RUNTIME_PREFIX is set
  meson.build: remove -DCURL_DISABLE_TYPECHECK

8 files changed, 94 insertions, 34 deletions

diff --git a/Documentation/meson.build b/Documentation/meson.build
index 8d9cd98548..0d4de28aca 100644
--- a/Documentation/meson.build
+++ b/Documentation/meson.build
@@ -250,6 +250,16 @@ if docs_backend == 'asciidoc'
     '--attribute=build_dir=' + meson.current_build_dir(),
   ]
 
+  pager_opt = get_option('default_pager')
+  if pager_opt != '' and pager_opt != 'less'
+    asciidoc_common_options += '-agit-default-pager=' + pager_opt
+  endif
+
+  editor_opt = get_option('default_editor')
+  if editor_opt != '' and editor_opt != 'vi'
+    asciidoc_common_options += '-agit-default-editor=' + editor_opt
+  endif
+
   documentation_deps = [
     asciidoc_conf,
   ]
@@ -287,6 +297,16 @@ elif docs_backend == 'asciidoctor'
     '--require', 'asciidoctor-extensions',
   ]
 
+  pager_opt = get_option('default_pager')
+  if pager_opt != '' and pager_opt != 'less'
+    asciidoc_common_options += '-agit-default-pager=' + pager_opt
+  endif
+
+  editor_opt = get_option('default_editor')
+  if editor_opt != '' and editor_opt != 'vi'
+    asciidoc_common_options += '-agit-default-editor=' + editor_opt
+  endif
+
   documentation_deps = [
     asciidoctor_extensions,
   ]
diff --git a/Makefile b/Makefile
index 0b46dee0da..39b7c15524 100644
--- a/Makefile
+++ b/Makefile
@@ -340,9 +340,6 @@ include shared.mak
 #
 # Define HAVE_SYNC_FILE_RANGE if your platform has sync_file_range.
 #
-# Define NEEDS_LIBRT if your platform requires linking with librt (glibc version
-# before 2.17) for clock_gettime and CLOCK_MONOTONIC.
-#
 # Define HAVE_BSD_SYSCTL if your platform has a BSD-compatible sysctl function.
 #
 # Define HAVE_GETDELIM if your system has the getdelim() function.
@@ -2174,18 +2171,14 @@ ifdef HAVE_SYNC_FILE_RANGE
 	BASIC_CFLAGS += -DHAVE_SYNC_FILE_RANGE
 endif
 
-ifdef NEEDS_LIBRT
-	EXTLIBS += -lrt
+ifdef HAVE_SYSINFO
+	BASIC_CFLAGS += -DHAVE_SYSINFO
 endif
 
 ifdef HAVE_BSD_SYSCTL
 	BASIC_CFLAGS += -DHAVE_BSD_SYSCTL
 endif
 
-ifdef HAVE_BSD_KERN_PROC_SYSCTL
-	BASIC_CFLAGS += -DHAVE_BSD_KERN_PROC_SYSCTL
-endif
-
 ifdef HAVE_GETDELIM
 	BASIC_CFLAGS += -DHAVE_GETDELIM
 endif
@@ -2216,25 +2209,33 @@ ifneq ($(findstring openssl,$(CSPRNG_METHOD)),)
 	EXTLIBS += -lcrypto -lssl
 endif
 
-ifneq ($(PROCFS_EXECUTABLE_PATH),)
-	procfs_executable_path_SQ = $(subst ','\'',$(PROCFS_EXECUTABLE_PATH))
-	BASIC_CFLAGS += '-DPROCFS_EXECUTABLE_PATH="$(procfs_executable_path_SQ)"'
-endif
-
 ifndef HAVE_PLATFORM_PROCINFO
 	COMPAT_OBJS += compat/stub/procinfo.o
 endif
 
-ifdef HAVE_NS_GET_EXECUTABLE_PATH
-	BASIC_CFLAGS += -DHAVE_NS_GET_EXECUTABLE_PATH
-endif
+ifdef RUNTIME_PREFIX
 
-ifdef HAVE_ZOS_GET_EXECUTABLE_PATH
-        BASIC_CFLAGS += -DHAVE_ZOS_GET_EXECUTABLE_PATH
-endif
+        ifdef HAVE_BSD_KERN_PROC_SYSCTL
+		BASIC_CFLAGS += -DHAVE_BSD_KERN_PROC_SYSCTL
+        endif
+
+        ifneq ($(PROCFS_EXECUTABLE_PATH),)
+		pep_SQ = $(subst ','\'',$(PROCFS_EXECUTABLE_PATH))
+		BASIC_CFLAGS += '-DPROCFS_EXECUTABLE_PATH="$(pep_SQ)"'
+        endif
+
+        ifdef HAVE_NS_GET_EXECUTABLE_PATH
+		BASIC_CFLAGS += -DHAVE_NS_GET_EXECUTABLE_PATH
+        endif
+
+        ifdef HAVE_ZOS_GET_EXECUTABLE_PATH
+		BASIC_CFLAGS += -DHAVE_ZOS_GET_EXECUTABLE_PATH
+        endif
+
+        ifdef HAVE_WPGMPTR
+		BASIC_CFLAGS += -DHAVE_WPGMPTR
+        endif
 
-ifdef HAVE_WPGMPTR
-	BASIC_CFLAGS += -DHAVE_WPGMPTR
 endif
 
 ifdef FILENO_IS_A_MACRO
diff --git a/builtin/gc.c b/builtin/gc.c
index 856dd50559..a5b86bbf16 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -424,8 +424,13 @@ static uint64_t total_ram(void)
 #if defined(HAVE_SYSINFO)
 	struct sysinfo si;
 
-	if (!sysinfo(&si))
-		return si.totalram;
+	if (!sysinfo(&si)) {
+		uint64_t total = si.totalram;
+
+		if (si.mem_unit > 1)
+			total *= (uint64_t)si.mem_unit;
+		return total;
+	}
 #elif defined(HAVE_BSD_SYSCTL) && (defined(HW_MEMSIZE) || defined(HW_PHYSMEM))
 	int64_t physical_memory;
 	int mib[2];
diff --git a/config.mak.uname b/config.mak.uname
index b12d4e168a..db22a8fb31 100644
--- a/config.mak.uname
+++ b/config.mak.uname
@@ -48,18 +48,18 @@ ifeq ($(uname_S),OSF1)
 endif
 ifeq ($(uname_S),Linux)
 	HAVE_ALLOCA_H = YesPlease
+	# override in config.mak if you have glibc >= 2.38
 	NO_STRLCPY = YesPlease
+	CSPRNG_METHOD = getrandom
 	HAVE_PATHS_H = YesPlease
 	LIBC_CONTAINS_LIBINTL = YesPlease
 	HAVE_DEV_TTY = YesPlease
 	HAVE_CLOCK_GETTIME = YesPlease
 	HAVE_CLOCK_MONOTONIC = YesPlease
-	# -lrt is needed for clock_gettime on glibc <= 2.16
-	NEEDS_LIBRT = YesPlease
 	HAVE_SYNC_FILE_RANGE = YesPlease
 	HAVE_GETDELIM = YesPlease
 	FREAD_READS_DIRECTORIES = UnfortunatelyYes
-	BASIC_CFLAGS += -DHAVE_SYSINFO
+	HAVE_SYSINFO = YesPlease
 	PROCFS_EXECUTABLE_PATH = /proc/self/exe
 	HAVE_PLATFORM_PROCINFO = YesPlease
 	COMPAT_OBJS += compat/linux/procinfo.o
@@ -246,9 +246,16 @@ ifeq ($(uname_O),Cygwin)
 		# Try commenting this out if you suspect MMAP is more efficient
 		NO_MMAP = YesPlease
         else
-		NO_REGEX = UnfortunatelyYes
+                ifeq ($(shell expr "$(uname_R)" : '1\.7\.'),4)
+		        NO_REGEX = UnfortunatelyYes
+                endif
         endif
 	HAVE_DEV_TTY = YesPlease
+	HAVE_GETDELIM = YesPlease
+	HAVE_CLOCK_GETTIME = YesPlease
+	HAVE_CLOCK_MONOTONIC = YesPlease
+	HAVE_SYSINFO = YesPlease
+	CSPRNG_METHOD = arc4random
 	HAVE_ALLOCA_H = YesPlease
 	NEEDS_LIBICONV = YesPlease
 	NO_FAST_WORKING_DIRECTORY = UnfortunatelyYes
diff --git a/configure.ac b/configure.ac
index 5923edc44a..d7e0503f1e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1066,6 +1066,14 @@ AC_CHECK_LIB([iconv], [locale_charset],
        [AC_CHECK_LIB([charset], [locale_charset],
                      [CHARSET_LIB=-lcharset])])
 GIT_CONF_SUBST([CHARSET_LIB])
+
+#
+# Define HAVE_SYSINFO=YesPlease if sysinfo is available.
+GIT_CHECK_FUNC(sysinfo,
+	[HAVE_SYSINFO=YesPlease],
+	[HAVE_SYSINFO=])
+GIT_CONF_SUBST([HAVE_SYSINFO])
+
 #
 # Define HAVE_CLOCK_GETTIME=YesPlease if clock_gettime is available.
 GIT_CHECK_FUNC(clock_gettime,
diff --git a/meson.build b/meson.build
index b906e78d89..410bbf93da 100644
--- a/meson.build
+++ b/meson.build
@@ -727,10 +727,7 @@ endif
 # These variables are used for building libgit.a.
 libgit_c_args = [
   '-DBINDIR="' + get_option('bindir') + '"',
-  '-DDEFAULT_EDITOR="' + get_option('default_editor') + '"',
   '-DDEFAULT_GIT_TEMPLATE_DIR="' + get_option('datadir') / 'git-core/templates' + '"',
-  '-DDEFAULT_HELP_FORMAT="' + get_option('default_help_format') + '"',
-  '-DDEFAULT_PAGER="' + get_option('default_pager') + '"',
   '-DETC_GITATTRIBUTES="' + get_option('gitattributes') + '"',
   '-DETC_GITCONFIG="' + get_option('gitconfig') + '"',
   '-DFALLBACK_RUNTIME_PREFIX="' + get_option('prefix') + '"',
@@ -742,6 +739,29 @@ libgit_c_args = [
   '-DPAGER_ENV="' + get_option('pager_environment') + '"',
   '-DSHELL_PATH="' + fs.as_posix(target_shell.full_path()) + '"',
 ]
+
+editor_opt = get_option('default_editor')
+if editor_opt != '' and editor_opt != 'vi'
+  libgit_c_args += '-DDEFAULT_EDITOR="' + editor_opt + '"'
+endif
+
+pager_opt = get_option('default_pager')
+if pager_opt != '' and pager_opt != 'less'
+  libgit_c_args += '-DDEFAULT_PAGER="' + pager_opt + '"'
+endif
+
+help_format_opt = get_option('default_help_format')
+if help_format_opt == 'platform'
+  if host_machine.system() == 'windows'
+    help_format_opt = 'html'
+  else
+    help_format_opt = 'man'
+  endif
+endif
+if help_format_opt != 'man'
+    libgit_c_args += '-DDEFAULT_HELP_FORMAT="' + help_format_opt + '"'
+endif
+
 libgit_include_directories = [ '.' ]
 libgit_dependencies = [ ]
 
@@ -1012,7 +1032,6 @@ if curl.found()
   # Most executables don't have to link against libcurl, but we still need its
   # include directories so that we can resolve LIBCURL_VERSION in "help.c".
   libgit_dependencies += curl.partial_dependency(includes: true)
-  libgit_c_args += '-DCURL_DISABLE_TYPECHECK'
   build_options_config.set('NO_CURL', '')
 else
   libgit_c_args += '-DNO_CURL'
diff --git a/meson_options.txt b/meson_options.txt
index 78d172a740..8ac30a5223 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -95,7 +95,7 @@ option('highlight_bin', type: 'string', value: 'highlight')
 # Documentation.
 option('docs', type: 'array', choices: ['man', 'html'], value: [],
   description: 'Which documenattion formats to build and install.')
-option('default_help_format', type: 'combo', choices: ['man', 'html'], value: 'man',
+option('default_help_format', type: 'combo', choices: ['man', 'html', 'platform'], value: 'platform',
   description: 'Default format used when executing git-help(1).')
 option('docs_backend', type: 'combo', choices: ['asciidoc', 'asciidoctor', 'auto'], value: 'auto',
   description: 'Which backend to use to generate documentation.')
diff --git a/t/t7815-grep-binary.sh b/t/t7815-grep-binary.sh
index 3bd91da970..b7d83f9a5d 100755
--- a/t/t7815-grep-binary.sh
+++ b/t/t7815-grep-binary.sh
@@ -63,7 +63,7 @@ test_expect_success 'git grep ile a' '
 	git grep ile a
 '
 
-test_expect_failure 'git grep .fi a' '
+test_expect_failure !CYGWIN 'git grep .fi a' '
 	git grep .fi a
 '