diff --git a/easybuild/easyconfigs/__archive__/b/Bison/Bison-3.0.4-GCCcore-system.eb b/easybuild/easyconfigs/__archive__/b/Bison/Bison-3.0.4-GCCcore-system.eb
new file mode 100644
index 000000000..2feeed35a
--- /dev/null
+++ b/easybuild/easyconfigs/__archive__/b/Bison/Bison-3.0.4-GCCcore-system.eb
@@ -0,0 +1,32 @@
+easyblock = 'ConfigureMake'
+
+name = 'Bison'
+version = '3.0.4'
+
+homepage = 'http://www.gnu.org/software/bison'
+description = """Bison is a general-purpose parser generator that converts an annotated context-free grammar
+ into a deterministic LR or generalized LR (GLR) parser employing LALR(1) parser tables."""
+
+toolchain = {'name': 'GCCcore', 'version': 'system'}
+# Can't rely on binutils in this case (since this is a dep) so switch off architecture optimisations
+toolchainopts = {'optarch': False}
+
+source_urls = [GNU_SOURCE]
+sources = [SOURCELOWER_TAR_GZ]
+patches = ['Bison-%(version)s_glibc_2.28.patch']
+checksums = [
+    'b67fd2daae7a64b5ba862c66c07c1addb9e6b1b05c5f2049392cfd8a2172952e',  # bison-3.0.4.tar.gz
+    'bdceb534ef7717bdbbd272bbdf154d5a41e8073cd8d49fe0b02540bbdba68a57',  # Bison-3.0.4_glibc_2.28.patch
+]
+
+builddependencies = [
+    ('M4', '1.4.18'),
+]
+
+
+sanity_check_paths = {
+    'files': ['bin/%s' % x for x in ['bison', 'yacc']] + [('lib/liby.a', 'lib64/liby.a')],
+    'dirs': [],
+}
+
+moduleclass = 'lang'
diff --git a/easybuild/easyconfigs/__archive__/b/Bison/Bison-3.0.4_glibc_2.28.patch b/easybuild/easyconfigs/__archive__/b/Bison/Bison-3.0.4_glibc_2.28.patch
new file mode 100644
index 000000000..cba2576a3
--- /dev/null
+++ b/easybuild/easyconfigs/__archive__/b/Bison/Bison-3.0.4_glibc_2.28.patch
@@ -0,0 +1,31 @@
+patch to avoid problems on systems using glibc 2.28 (or newer)
+author: Esteban Vohringer-Martinezi (Universidad de Concepción)
+diff -ru bison-3.0.4_orig/lib/fseterr.c bison-3.0.4/lib/fseterr.c
+--- bison-3.0.4_orig/lib/fseterr.c	2019-06-19 15:56:23.552533933 -0400
++++ bison-3.0.4/lib/fseterr.c	2019-06-19 15:58:32.757469045 -0400
+@@ -29,7 +29,7 @@
+   /* Most systems provide FILE as a struct and the necessary bitmask in
+      <stdio.h>, because they need it for implementing getc() and putc() as
+      fast macros.  */
+-#if defined _IO_ftrylockfile || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
++#if defined _IO_EOF_SEEN || __GNU_LIBRARY__ == 1 /* GNU libc, BeOS, Haiku, Linux libc5 */
+   fp->_flags |= _IO_ERR_SEEN;
+ #elif defined __sferror || defined __DragonFly__ /* FreeBSD, NetBSD, OpenBSD, DragonFly, Mac OS X, Cygwin */
+   fp_->_flags |= __SERR;
+diff -ru bison-3.0.4_orig/lib/stdio-impl.h bison-3.0.4/lib/stdio-impl.h
+--- bison-3.0.4_orig/lib/stdio-impl.h	2019-06-19 15:56:23.556533962 -0400
++++ bison-3.0.4/lib/stdio-impl.h	2019-06-19 15:57:44.497120445 -0400
+@@ -19,6 +19,13 @@
+    have different naming conventions, or their access requires some casts.  */
+ 
+ 
++/* Glibc 2.28 made _IO_IN_BACKUP private.  For now, work around this
++   problem by defining it ourselves.  FIXME: Do not rely on glibc
++   internals.  */
++#if !defined _IO_IN_BACKUP && defined _IO_EOF_SEEN
++# define _IO_IN_BACKUP 0x100
++#endif
++
+ /* BSD stdio derived implementations.  */
+ 
+ #if defined __NetBSD__                         /* NetBSD */
diff --git a/easybuild/easyconfigs/__archive__/b/Bison/Bison-3.0.5-GCCcore-system.eb b/easybuild/easyconfigs/__archive__/b/Bison/Bison-3.0.5-GCCcore-system.eb
new file mode 100644
index 000000000..063383dfa
--- /dev/null
+++ b/easybuild/easyconfigs/__archive__/b/Bison/Bison-3.0.5-GCCcore-system.eb
@@ -0,0 +1,28 @@
+easyblock = 'ConfigureMake'
+
+name = 'Bison'
+version = '3.0.5'
+
+homepage = 'http://www.gnu.org/software/bison'
+description = """Bison is a general-purpose parser generator that converts an annotated context-free grammar
+ into a deterministic LR or generalized LR (GLR) parser employing LALR(1) parser tables."""
+
+toolchain = {'name': 'GCCcore', 'version': 'system'}
+# Can't rely on binutils in this case (since this is a dep) so switch off architecture optimisations
+toolchainopts = {'optarch': False}
+
+sources = [SOURCELOWER_TAR_GZ]
+source_urls = [GNU_SOURCE]
+checksums = ['cd399d2bee33afa712bac4b1f4434e20379e9b4099bce47189e09a7675a2d566']
+
+builddependencies = [
+    ('M4', '1.4.18'),
+]
+
+
+sanity_check_paths = {
+    'files': ['bin/%s' % x for x in ['bison', 'yacc']] + [('lib/liby.a', 'lib64/liby.a')],
+    'dirs': [],
+}
+
+moduleclass = 'lang'
diff --git a/easybuild/easyconfigs/__archive__/b/binutils/binutils-2.29-GCCcore-system.eb b/easybuild/easyconfigs/__archive__/b/binutils/binutils-2.29-GCCcore-system.eb
new file mode 100644
index 000000000..46f269e73
--- /dev/null
+++ b/easybuild/easyconfigs/__archive__/b/binutils/binutils-2.29-GCCcore-system.eb
@@ -0,0 +1,24 @@
+name = 'binutils'
+version = '2.29'
+
+homepage = 'http://directory.fsf.org/project/binutils/'
+description = "binutils: GNU binary utilities"
+
+toolchain = {'name': 'GCCcore', 'version': 'system'}
+
+source_urls = [GNU_SOURCE]
+sources = [SOURCE_TAR_GZ]
+checksums = ['172e8c89472cf52712fd23a9f14e9bca6182727fb45b0f8f482652a83d5a11b4']
+
+builddependencies = [
+    ('flex', '2.6.4'),
+    ('Bison', '3.0.4'),
+]
+
+dependencies = [
+    # zlib is a runtime dep to avoid that it gets embedded in libbfd.so,
+    # see https://github.com/easybuilders/easybuild-easyblocks/issues/1350
+    ('zlib', '1.2.11'),
+]
+
+moduleclass = 'tools'
diff --git a/easybuild/easyconfigs/__archive__/f/flex/flex-2.6.4-GCCcore-system.eb b/easybuild/easyconfigs/__archive__/f/flex/flex-2.6.4-GCCcore-system.eb
new file mode 100644
index 000000000..f40b2d8e7
--- /dev/null
+++ b/easybuild/easyconfigs/__archive__/f/flex/flex-2.6.4-GCCcore-system.eb
@@ -0,0 +1,33 @@
+name = 'flex'
+version = '2.6.4'
+
+homepage = 'http://flex.sourceforge.net/'
+
+description = """
+ Flex (Fast Lexical Analyzer) is a tool for generating scanners. A scanner,
+ sometimes called a tokenizer, is a program which recognizes lexical patterns
+ in text.
+"""
+
+toolchain = {'name': 'GCCcore', 'version': 'system'}
+# Can't rely on binutils in this case (since this is a dep) so switch off architecture optimisations
+toolchainopts = {'optarch': False, 'pic': True}
+
+source_urls = ['https://github.com/westes/flex/releases/download/v%(version)s/']
+sources = [SOURCELOWER_TAR_GZ]
+checksums = ['e87aae032bf07c26f85ac0ed3250998c37621d95f8bd748b31f15b33c45ee995']
+
+builddependencies = [
+    ('Bison', '3.0.5'),
+    ('help2man', '1.47.4'),
+]
+
+dependencies = [
+    ('M4', '1.4.18'),
+]
+
+# glibc 2.26 requires _GNU_SOURCE defined to expose reallocarray in the correct
+# header, see https://github.com/westes/flex/issues/241
+preconfigopts = 'export CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE" && '
+
+moduleclass = 'lang'
diff --git a/easybuild/easyconfigs/__archive__/h/help2man/help2man-1.47.4-GCCcore-system.eb b/easybuild/easyconfigs/__archive__/h/help2man/help2man-1.47.4-GCCcore-system.eb
new file mode 100644
index 000000000..44852c268
--- /dev/null
+++ b/easybuild/easyconfigs/__archive__/h/help2man/help2man-1.47.4-GCCcore-system.eb
@@ -0,0 +1,22 @@
+easyblock = 'ConfigureMake'
+
+name = 'help2man'
+version = '1.47.4'
+
+homepage = 'https://www.gnu.org/software/help2man/'
+description = """help2man produces simple manual pages from the '--help' and '--version' output of other commands."""
+
+toolchain = {'name': 'GCCcore', 'version': 'system'}
+# Can't rely on binutils in this case (since help2man is an implied dep) so switch off architecture optimisations
+toolchainopts = {'optarch': False}
+
+source_urls = [GNU_SOURCE]
+sources = [SOURCE_TAR_XZ]
+checksums = ['d4ecf697d13f14dd1a78c5995f06459bff706fd1ce593d1c02d81667c0207753']
+
+sanity_check_paths = {
+    'files': ['bin/help2man'],
+    'dirs': [],
+}
+
+moduleclass = 'tools'
diff --git a/easybuild/easyconfigs/__archive__/m/M4/M4-1.4.18-GCCcore-system.eb b/easybuild/easyconfigs/__archive__/m/M4/M4-1.4.18-GCCcore-system.eb
new file mode 100644
index 000000000..6df13418c
--- /dev/null
+++ b/easybuild/easyconfigs/__archive__/m/M4/M4-1.4.18-GCCcore-system.eb
@@ -0,0 +1,38 @@
+easyblock = 'ConfigureMake'
+
+name = 'M4'
+version = '1.4.18'
+
+homepage = 'http://www.gnu.org/software/m4/m4.html'
+description = """GNU M4 is an implementation of the traditional Unix macro processor. It is mostly SVR4 compatible
+  although it has some extensions (for example, handling more than 9 positional parameters to macros).
+ GNU M4 also has built-in functions for including files, running shell commands, doing arithmetic, etc."""
+
+toolchain = {'name': 'GCCcore', 'version': 'system'}
+# Can't rely on binutils in this case (since this is an implied dep) so switch off architecture optimisations
+toolchainopts = {'optarch': False}
+
+sources = [SOURCELOWER_TAR_GZ]
+source_urls = [GNU_SOURCE]
+
+patches = [
+    'M4-1.4.18_glibc_2.28.patch',
+    'M4-1.4.18_glibc_2.34.patch',
+]
+
+checksums = [
+    'ab2633921a5cd38e48797bf5521ad259bdc4b979078034a3b790d7fec5493fab',  # m4-1.4.18.tar.gz
+    'a613c18f00b1a3caa46ae4b8b849a0f4f71095ad860f4fcd6c6bb4ae211681fa',  # M4-1.4.18_glibc_2.28.patch
+    '75f0ccc981bf313f5eb4e203a9f8b1ef9e633d840064587405cf360107d4915a',  # M4-1.4.18_glibc_2.34.patch
+]
+
+# '-fgnu89-inline' is required to avoid linking errors with older glibc's,
+# see https://github.com/easybuilders/easybuild-easyconfigs/issues/529
+configopts = "--enable-c++ CPPFLAGS=-fgnu89-inline"
+
+sanity_check_paths = {
+    'files': ["bin/m4"],
+    'dirs': [],
+}
+
+moduleclass = 'devel'
diff --git a/easybuild/easyconfigs/__archive__/z/zlib/zlib-1.2.11-GCCcore-system.eb b/easybuild/easyconfigs/__archive__/z/zlib/zlib-1.2.11-GCCcore-system.eb
new file mode 100644
index 000000000..972fae4f4
--- /dev/null
+++ b/easybuild/easyconfigs/__archive__/z/zlib/zlib-1.2.11-GCCcore-system.eb
@@ -0,0 +1,24 @@
+easyblock = 'ConfigureMake'
+
+name = 'zlib'
+version = '1.2.11'
+
+homepage = 'http://www.zlib.net/'
+description = """zlib is designed to be a free, general-purpose, legally unencumbered -- that is,
+ not covered by any patents -- lossless data-compression library for use on virtually any
+ computer hardware and operating system."""
+
+toolchain = {'name': 'GCCcore', 'version': 'system'}
+# Can't rely on binutils in this case (since this is a dep) so switch off architecture optimisations
+toolchainopts = {'optarch': False, 'pic': True}
+
+source_urls = ['http://zlib.net/fossils']
+sources = [SOURCELOWER_TAR_GZ]
+checksums = ['c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1']
+
+sanity_check_paths = {
+    'files': ['include/zconf.h', 'include/zlib.h', 'lib/libz.a', 'lib/libz.%s' % SHLIB_EXT],
+    'dirs': [],
+}
+
+moduleclass = 'lib'