docs: use $(INSTALL_DATA) to install man page

Fixes #3518
Closes #3522

diff --git a/docs/Makefile.am b/docs/Makefile.am
index 0183f1af5b44f7f6a09c9d87320722d76b7862db..dadf64f384cefa76c2d48e57984afe3d44c3572c 100644 (file)
--- a/docs/Makefile.am
+++ b/docs/Makefile.am
@@ -95,7 +95,7 @@ SUFFIXES = .1 .html .pdf
 # have changed.
 $(abs_builddir)/curl.1:
        if test "$(top_builddir)x" != "$(top_srcdir)x" -a -e "$(srcdir)/curl.1"; then \
-               cp -fp "$(srcdir)/curl.1" $@; fi
+               $(INSTALL_DATA) "$(srcdir)/curl.1" $@; fi
        cd cmdline-opts && $(MAKE)
 
 html: $(HTMLPAGES)