dev-libs/isl: respect CFLAGS

Drop the fun (and aggressive) AX_CC_MAXOPT macro call
which was causing us to not respect the user's CFLAGS.

Note that 0.24 seemed to be triggering maintainer mode;
have chucked eautoreconf into the ebuild for 0.24-r1
given it seemingly wasn't doing any harm to be doing
it informally in 0.24 anyway, but will keep an eye on
it.

Revbump because of the aforementioned churn in a
critical dependency.

Bug: https://bugs.gentoo.org/815700
Signed-off-by: Sam James <sam@gentoo.org>

dev-libs/isl/files/isl-0.24-gdb-autoload-dir.patch

@@ -0,0 +1,35 @@
+diff -Naur isl-0.19.orig/Makefile.in isl-0.19/Makefile.in
+--- isl-0.19.orig/Makefile.in	2018-03-03 11:32:15.000000000 -0500
++++ isl-0.19/Makefile.in	2018-03-10 17:29:30.039182728 -0500
+@@ -2269,10 +2269,10 @@
+ 	case $$libisl in \
+ 	'') echo Cannot find isl library name. GDB bindings not installed.;; \
+ 	*) echo $(INSTALL_DATA) $(srcdir)/libisl-gdb.py \
+-		$(DESTDIR)$(libdir)/$$libisl-gdb.py; \
+-	test -z "$(libdir)" || $(MKDIR_P) "$(DESTDIR)$(libdir)"; \
++		$(DESTDIR)$(prefix)/share/gdb/auto-load$(libdir)/$$libisl-gdb.py; \
++	test -z "$(libdir)" || $(MKDIR_P) "$(DESTDIR)$(prefix)/share/gdb/auto-load$(libdir)"; \
+ 	$(INSTALL_DATA) $(srcdir)/libisl-gdb.py \
+-	    $(DESTDIR)$(libdir)/$$libisl-gdb.py; \
++	    $(DESTDIR)$(prefix)/share/gdb/auto-load$(libdir)/$$libisl-gdb.py; \
+ 	esac
+ 
+ uninstall-local:
+diff --git a/Makefile.am b/Makefile.am
+index 96cac65..8bb6aa2 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -639,10 +639,10 @@ install-data-local: $(srcdir)/libisl-gdb.py
+ 	case $$libisl in \
+ 	'') echo Cannot find isl library name. GDB bindings not installed.;; \
+ 	*) echo $(INSTALL_DATA) $(srcdir)/libisl-gdb.py \
+-		$(DESTDIR)$(libdir)/$$libisl-gdb.py; \
+-	test -z "$(libdir)" || $(MKDIR_P) "$(DESTDIR)$(libdir)"; \
++		$(DESTDIR)$(prefix)/share/gdb/auto-load$(libdir)/$$libisl-gdb.py; \
++	test -z "$(libdir)" || $(MKDIR_P) "$(DESTDIR)$(prefix)/share/gdb/auto-load$(libdir)"; \
+ 	$(INSTALL_DATA) $(srcdir)/libisl-gdb.py \
+-	    $(DESTDIR)$(libdir)/$$libisl-gdb.py; \
++		$(DESTDIR)$(prefix)/share/gdb/auto-load$(libdir)/$$libisl-gdb.py; \
+ 	esac
+ 
+ uninstall-local:

dev-libs/isl/files/isl-0.24-respect-flags.patch

@@ -0,0 +1,14 @@
+https://bugs.gentoo.org/815700
+
+--- a/configure.ac
++++ b/configure.ac
+@@ -22,7 +22,6 @@ AC_PROG_CC
+ AC_PROG_CXX
+ AX_PROG_CC_FOR_BUILD
+ 
+-AX_CC_MAXOPT
+ AX_GCC_WARN_UNUSED_RESULT
+ AX_C___ATTRIBUTE__
+ 
+-- 
+

dev-libs/isl/isl-0.24-r1.ebuild

@@ -0,0 +1,80 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit autotools multilib-minimal preserve-libs toolchain-funcs
+
+DESCRIPTION="A library for manipulating integer points bounded by linear constraints"
+HOMEPAGE="http://isl.gforge.inria.fr/"
+SRC_URI="http://isl.gforge.inria.fr/${P}.tar.xz"
+
+LICENSE="LGPL-2.1"
+SLOT="0/23"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~ppc-macos ~x64-macos ~sparc-solaris ~sparc64-solaris ~x64-solaris ~x86-solaris"
+IUSE="static-libs"
+
+RDEPEND=">=dev-libs/gmp-5.1.3-r1[${MULTILIB_USEDEP}]"
+DEPEND="${RDEPEND}"
+BDEPEND="
+	app-arch/xz-utils
+	virtual/pkgconfig"
+
+DOCS=( ChangeLog AUTHORS doc/manual.pdf )
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-0.24-gdb-autoload-dir.patch
+	"${FILESDIR}"/${PN}-0.24-nobash.patch
+	"${FILESDIR}"/${PN}-0.24-respect-flags.patch
+)
+
+src_prepare() {
+	default
+
+	eautoreconf
+}
+
+multilib_src_configure() {
+	local econf_opts=(
+		$(use_enable static-libs static)
+
+		# AX_PROG_CC_FOR_BUILD deficiency:
+		# https://wiki.gentoo.org/wiki/Project:Toolchain/use_native_symlinks
+		CC_FOR_BUILD="$(tc-getBUILD_CC)"
+	)
+
+	if ! tc-is-cross-compiler; then
+		# Incorrect CFLAGS handling as CFLAGS_FOR_BUILD
+		# even for native builds. As a result -O3 is being used
+		# regardless of user's CFLAGS.
+		econf_opts+=(
+			CFLAGS_FOR_BUILD="${CFLAGS}"
+		)
+	fi
+
+	ECONF_SOURCE="${S}" econf "${econf_opts[@]}"
+}
+
+multilib_src_install_all() {
+	einstalldocs
+
+	find "${ED}" -type f -name '*.la' -delete || die
+}
+
+pkg_preinst() {
+	preserve_old_lib \
+		/usr/$(get_libdir)/libisl$(get_libname 14) \
+		/usr/$(get_libdir)/libisl$(get_libname 15) \
+		/usr/$(get_libdir)/libisl$(get_libname 19) \
+		/usr/$(get_libdir)/libisl$(get_libname 21) \
+		/usr/$(get_libdir)/libisl$(get_libname 22)
+}
+
+pkg_postinst() {
+	preserve_old_lib_notify \
+		/usr/$(get_libdir)/libisl$(get_libname 14) \
+		/usr/$(get_libdir)/libisl$(get_libname 15) \
+		/usr/$(get_libdir)/libisl$(get_libname 19) \
+		/usr/$(get_libdir)/libisl$(get_libname 21) \
+		/usr/$(get_libdir)/libisl$(get_libname 22)
+}

dev-libs/isl/isl-0.24.ebuild

@@ -1,7 +1,7 @@
 # Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
-EAPI="7"
+EAPI=7
 
 inherit multilib-minimal preserve-libs toolchain-funcs
 
@@ -35,6 +35,7 @@ multilib_src_configure() {
 		# https://wiki.gentoo.org/wiki/Project:Toolchain/use_native_symlinks
 		CC_FOR_BUILD="$(tc-getBUILD_CC)"
 	)
+
 	if ! tc-is-cross-compiler; then
 		# Incorrect CFLAGS handling as CFLAGS_FOR_BUILD
 		# even for native builds. As a result -O3 is being used
@@ -49,7 +50,8 @@ multilib_src_configure() {
 
 multilib_src_install_all() {
 	einstalldocs
-	find "${ED}" -type f -name '*.la' -delete
+
+	find "${ED}" -type f -name '*.la' -delete || die
 }
 
 pkg_preinst() {