update scriptlets (#1644106)

use %make_build %make_install

if this is intended to be used in fedora (28+) only, can drop the
%%ldconfig_scriptlets and info-related scriptlets altogether.

mpfr.spec

@@ -1,13 +1,11 @@
 Summary: A C library for multiple-precision floating-point computations
 Name: mpfr
 Version: 3.1.6
-Release: 2%{?dist}
+Release: 3%{?dist}
 URL: http://www.mpfr.org/
 # GFDL (mpfr.texi, mpfr.info and fdl.texi)
 License: LGPLv3+ and GPLv3+ and GFDL
 BuildRequires: autoconf libtool gmp-devel gcc
-Requires(post): /sbin/ldconfig
-Requires(postun): /sbin/ldconfig
 Requires: gmp >= 4.2.3
 
 Source0: http://www.mpfr.org/%{name}-%{version}/%{name}-%{version}.tar.xz
@@ -29,9 +27,13 @@ ANSI/IEEE-754 standard for double-precision floating-point arithmetic
 
 %package devel
 Summary: Development files for the MPFR library
-Requires: %{name} = %{version}-%{release}
-Requires(post): /sbin/install-info
-Requires(preun): /sbin/install-info
+Requires: %{name}%{?_isa} = %{version}-%{release}
+# https://fedoraproject.org/wiki/Packaging:Scriptlets#Texinfo
+%if 0%{?fedora} < 28 && 0%{?rhel} < 8
+%global info_scriptlet 1
+Requires(post): info
+Requires(preun): info
+%endif
 Requires: gmp-devel
 
 %description devel
@@ -47,10 +49,10 @@ install the mpfr package.
 
 %build
 %configure --disable-assert --disable-static
-make %{?_smp_mflags}
+%make_build
 
 %install
-make install DESTDIR=$RPM_BUILD_ROOT
+%make_install
 rm -f $RPM_BUILD_ROOT%{_libdir}/libmpfr.la
 rm -f $RPM_BUILD_ROOT%{_infodir}/dir
 
@@ -60,10 +62,9 @@ rm -f $RPM_BUILD_ROOT%{_pkgdocdir}/COPYING  $RPM_BUILD_ROOT%{_pkgdocdir}/COPYING
 %check
 make %{?_smp_mflags} check
 
-%post -p /sbin/ldconfig
-
-%postun -p /sbin/ldconfig
+%ldconfig_scriptlets
 
+%if 0%{?info_scriptlet}
 %post devel
 if [ -f %{_infodir}/mpfr.info.gz ]; then
     /sbin/install-info %{_infodir}/mpfr.info.gz %{_infodir}/dir || :
@@ -75,6 +76,7 @@ if [ "$1" = 0 ]; then
 	/sbin/install-info --delete %{_infodir}/mpfr.info.gz %{_infodir}/dir || :
     fi
 fi
+%endif
 
 %files
 %license COPYING COPYING.LESSER
@@ -88,6 +90,10 @@ fi
 %{_infodir}/mpfr.info*
 
 %changelog
+* Tue Oct 30 2018 Rex Dieter <rdieter@fedoraproject.org> - 3.1.6-3
+- update scriptlets (#1644106)
+- use %%make_build %%make_install
+
 * Fri Jul 13 2018 Fedora Release Engineering <releng@fedoraproject.org> - 3.1.6-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild