specfile: added BuildRequires for 'gcc'

https://fedoraproject.org/wiki/Packaging:C_and_C%2B%2B#BuildRequire

gawk.spec

@@ -45,7 +45,7 @@
 Name:             gawk
 Summary:          The GNU version of the AWK text processing utility
 Version:          4.1.4
-Release:          7%{?dist}
+Release:          8%{?dist}
 
 License:          GPLv3+ and GPLv2+ and LGPLv2+ and BSD
 
@@ -67,9 +67,10 @@ Requires:         filesystem >= 3
 Requires(post):   info
 Requires(preun):  info
 
-BuildRequires:    ghostscript-core
 BuildRequires:    git
+BuildRequires:    gcc
 BuildRequires:    grep
+BuildRequires:    ghostscript-core
 
 # Extending GAWK possibilities:
 BuildRequires:    libsigsegv-devel
@@ -132,8 +133,7 @@ text processing.
 
 %package devel
 Summary:          Header file for gawk extensions development
-Requires:         %{name} = %{version}-%{release}
-BuildArch:        noarch
+Requires:         %{name}%{?_isa} = %{version}-%{release}
 
 %description devel
 This subpackage provides /usr/include/gawkapi.h header file, which contains
@@ -177,10 +177,10 @@ git commit --all --amend --no-edit > /dev/null
 
 %build
 %configure
-make %{?_smp_mflags}
+%make_build
 
 # Build the documentation in PDF, postscript and HTML versions:
-make -C doc pdf
+%make_build -C doc pdf
 mkdir -p html/gawk html/gawkinet
 makeinfo --html -I doc -o html/gawk     doc/gawk.texi
 makeinfo --html -I doc -o html/gawkinet doc/gawkinet.texi
@@ -191,8 +191,8 @@ makeinfo --html -I doc -o html/gawkinet doc/gawkinet.texi
 make check
 
 # Check we have correctly specified the ABI version for the current sources:
-api_major_vers=$(grep -e "gawk_api_major.*[[:digit:]]" gawkapi.h | grep -o -e "[[:digit:]]")
-api_minor_vers=$(grep -e "gawk_api_minor.*[[:digit:]]" gawkapi.h | grep -o -e "[[:digit:]]")
+api_major_vers=$(grep -i -e "gawk_api_major.*[[:digit:]]" gawkapi.h | grep -o -e "[[:digit:]]")
+api_minor_vers=$(grep -i -e "gawk_api_minor.*[[:digit:]]" gawkapi.h | grep -o -e "[[:digit:]]")
 
 if [[ "$api_major_vers" != %{gawk_api_major} || "$api_minor_vers" != %{gawk_api_minor} ]]; then
   echo "Build Error: specified gawk(abi) version [%{gawk_api_major}.%{gawk_api_minor}] is different than source code API version [$api_major_vers.$api_minor_vers]!" >&2
@@ -276,6 +276,11 @@ fi
 # =============================================================================
 
 %changelog
+* Thu Nov 23 2017 David Kaspar [Dee'Kej] <dkaspar@redhat.com> - 4.1.4-8
+- 'noarch' removed from *-devel subpackage
+- added arch requirement for *-devel subpackage
+- updated the build process to use %%make_build macro
+
 * Fri Sep 15 2017 David Kaspar [Dee'Kej] <dkaspar@redhat.com> - 4.1.4-7
 - Revert previous change of adding 'awk*' symlinks for info pages (bug #1486924)
 - Added patch to correctly fix the info pages issue (bug #1486924)