add support for --disable-gcov

For some targets (in my case VxWorks 5.5), libgcov does not compile due
to missing functions and macros such as getpid() and F_OK.

Incidentally, gcc/Makefile.in already contains comments such as

# Install gcov if it was compiled.

but there is no logic in place to actually allow gcov to not be
compiled.

So add an option for disabling build and install of libgcov and the
related host tools.

From-SVN: r262180

4 files changed, 30 insertions, 1 deletions

diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index 356721b..cef65b5 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,9 @@
+2018-06-27  Rasmus Villemoes  <rv@rasmusvillemoes.dk>
+
+	* configure.ac: Add --disable-gcov option.
+	* configure: Regenerate.
+	* Makefile.in: Honour @enable_gcov@.
+
 2018-06-21  Christophe Lyon  <christophe.lyon@linaro.org>
 
 	* config/arm/lib1funcs.S (__ARM_ARCH__): Remove definitions, use
diff --git a/libgcc/Makefile.in b/libgcc/Makefile.in
index dd8cee9..b7f2055 100644
--- a/libgcc/Makefile.in
+++ b/libgcc/Makefile.in
@@ -36,6 +36,7 @@ SHELL = @SHELL@
 
 cpu_type = @cpu_type@
 enable_shared = @enable_shared@
+enable_gcov = @enable_gcov@
 double_type_size = @double_type_size@
 long_double_type_size = @long_double_type_size@
 decimal_float = @decimal_float@
@@ -941,7 +942,10 @@ libgcc.a libgcov.a libunwind.a libgcc_eh.a:
 
 	$(RANLIB) $@
 
-all: libgcc.a libgcov.a
+all: libgcc.a
+ifeq ($(enable_gcov),yes)
+all: libgcov.a
+endif
 
 ifneq ($(LIBUNWIND),)
 all: libunwind.a
@@ -1164,9 +1168,11 @@ install-leaf: $(install-shared) $(install-libunwind)
 	$(INSTALL_DATA) libgcc.a $(DESTDIR)$(inst_libdir)/
 	chmod 644 $(DESTDIR)$(inst_libdir)/libgcc.a
 	$(RANLIB) $(DESTDIR)$(inst_libdir)/libgcc.a
+ifeq ($(enable_libgcov),yes)
 	$(INSTALL_DATA) libgcov.a $(DESTDIR)$(inst_libdir)/
 	chmod 644 $(DESTDIR)$(inst_libdir)/libgcov.a
 	$(RANLIB) $(DESTDIR)$(inst_libdir)/libgcov.a
+endif
 
 	parts="$(INSTALL_PARTS)";				\
 	for file in $$parts; do					\
diff --git a/libgcc/configure b/libgcc/configure
index b2f3f87..7906853 100644
--- a/libgcc/configure
+++ b/libgcc/configure
@@ -620,6 +620,7 @@ build_cpu
 build
 with_aix_soname
 enable_vtable_verify
+enable_gcov
 enable_shared
 libgcc_topdir
 target_alias
@@ -667,6 +668,7 @@ with_target_subdir
 with_cross_host
 with_ld
 enable_shared
+enable_gcov
 enable_vtable_verify
 with_aix_soname
 enable_version_specific_runtime_libs
@@ -1306,6 +1308,7 @@ Optional Features:
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
   --disable-shared        don't provide a shared libgcc
+  --disable-gcov          don't provide libgcov and related host tools
   --enable-vtable-verify    Enable vtable verification feature
   --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory
   --enable-maintainer-mode
@@ -2199,6 +2202,15 @@ fi
 
 
 
+# Check whether --enable-gcov was given.
+if test "${enable_gcov+set}" = set; then :
+  enableval=$enable_gcov;
+else
+  enable_gcov=yes
+fi
+
+
+
 # Check whether --enable-vtable-verify was given.
 if test "${enable_vtable_verify+set}" = set; then :
   enableval=$enable_vtable_verify; case "$enableval" in
diff --git a/libgcc/configure.ac b/libgcc/configure.ac
index b59aa74..9d0bbca 100644
--- a/libgcc/configure.ac
+++ b/libgcc/configure.ac
@@ -68,6 +68,11 @@ AC_ARG_ENABLE(shared,
 ], [enable_shared=yes])
 AC_SUBST(enable_shared)
 
+AC_ARG_ENABLE(gcov,
+[  --disable-gcov          don't provide libgcov and related host tools],
+[], [enable_gcov=yes])
+AC_SUBST(enable_gcov)
+
 AC_ARG_ENABLE(vtable-verify,
 [  --enable-vtable-verify    Enable vtable verification feature ],
 [case "$enableval" in