sci-libs/ta-lib: Fix build with slibtool

This fixes several issues with the build:

* Renames configure.in to configure.ac as is standard.

* Adds detection to configure.ac for libm to replaced the hardcoded
  instances of -lm.

* Links internal dependencies with .la files rather than -l linker
  flags. The -l linker flags are for external dependencies
  exclusively and this can break with slibtool.

* With slibtool there is a parellel make issue where gen_code binary is
  copied to ../../../bin before it is created and the Makefile.am needs
  to explicitly list gen_code as a prerequisite for the 'all-local'
  target. This probably happens because slibtool is significantly faster
  than GNU libtool.

* Additionally slibtool will output the gen_code binary to the .libs
  directory while slibtool will do so in the Makefile directory. The
  command needs to be invoked with $(LIBTOOL) --mode=execute to
  correctly copy the binary and not the slibtool wrapper script for the
  binary.

* Lastly there is a workaround for a slibtool bug where the cp(1)
  command is wrapped in a shell script. Invoking the command directly
  with --mode=execute will result in slibtool dropping the destination
  argument which obviously does not work. While this workaround is far
  from ideal, it will be portable for GNU libtool, slibtool now and
  slibtool when the bug is fixed.

Bug: https://bugs.gentoo.org/790770
Upstream-PR: https://sourceforge.net/p/ta-lib/patches/6/
Signed-off-by: orbea <orbea@riseup.net>
Closes: https://github.com/gentoo/gentoo/pull/25457
Signed-off-by: Sam James <sam@gentoo.org>

2 files changed, 133 insertions, 0 deletions

diff --git a/sci-libs/ta-lib/files/ta-lib-0.4.0-slibtool.patch b/sci-libs/ta-lib/files/ta-lib-0.4.0-slibtool.patch
new file mode 100644
index 000000000000..7aa9c96159eb
--- /dev/null
+++ b/sci-libs/ta-lib/files/ta-lib-0.4.0-slibtool.patch
@@ -0,0 +1,92 @@
+Upstream-PR: https://sourceforge.net/p/ta-lib/patches/6/
+From 05375dd96c3bdec814214f37a6c49d4a27079960 Mon Sep 17 00:00:00 2001
+From: orbea <orbea@riseup.net>
+Date: Thu, 12 May 2022 11:13:59 -0700
+Subject: [PATCH] Fix parallel Make issue with slibtool
+
+---
+ configure.in => configure.ac       |  4 ++++
+ src/tools/gen_code/Makefile.am     | 13 ++++++++-----
+ src/tools/gen_code/gen_code_bin.sh | 16 ++++++++++++++++
+ src/tools/ta_regtest/Makefile.am   |  4 ++--
+ 4 files changed, 30 insertions(+), 7 deletions(-)
+ rename configure.in => configure.ac (96%)
+ create mode 100755 src/tools/gen_code/gen_code_bin.sh
+
+diff --git a/configure.in b/configure.ac
+similarity index 96%
+rename from configure.in
+rename to configure.ac
+index d2e5784..359d400 100644
+--- a/configure.in
++++ b/configure.ac
+@@ -35,6 +35,10 @@ AC_FUNC_STRTOD
+ AC_FUNC_VPRINTF
+ AC_CHECK_FUNCS([floor isascii localeconv mblen memmove memset modf pow sqrt strcasecmp strchr strerror strncasecmp strrchr strstr strtol strtoul])
+ 
++# Checks for libm
++AC_CHECK_LIBM
++AC_SUBST([LIBM])
++
+ # Versioning:
+ # Only change this if library is no longer
+ # ABI compatible with previous version
+diff --git a/src/tools/gen_code/Makefile.am b/src/tools/gen_code/Makefile.am
+index cb839c2..2ec2360 100644
+--- a/src/tools/gen_code/Makefile.am
++++ b/src/tools/gen_code/Makefile.am
+@@ -6,9 +6,12 @@ noinst_PROGRAMS = gen_code
+ gen_code_SOURCES = gen_code.c
+ 
+ gen_code_CPPFLAGS = -I../../ta_common
+-gen_code_LDFLAGS = -L../../ta_common -L../../ta_abstract -L../../ta_func
+-gen_code_LDADD = -lta_common -lta_abstract_gc -lta_func -lm
++gen_code_LDFLAGS = -no-undefined
++gen_code_LDADD = \
++	../../ta_common/libta_common.la \
++	../../ta_abstract/libta_abstract_gc.la \
++	../../ta_func/libta_func.la \
++	$(LIBM)
+ 
+-all-local:
+-	$(MAKE) $(AM_MAKEFLAGS) gen_code
+-	cp gen_code ../../../bin
++all-local: gen_code
++	$(LIBTOOL) --mode=execute ./gen_code_bin.sh gen_code
+diff --git a/src/tools/gen_code/gen_code_bin.sh b/src/tools/gen_code/gen_code_bin.sh
+new file mode 100755
+index 0000000..b19fd09
+--- /dev/null
++++ b/src/tools/gen_code/gen_code_bin.sh
+@@ -0,0 +1,16 @@
++#!/bin/sh
++
++# This is a work around for a slibtool bug with --mode=execute
++#
++# With slibtool the gen_code binary is created in the .libs directory while GNU
++# libtool outputs in the same directory as the Makefile. This means that cp(1)
++# needs to be invoked with $(LIBTOOL) --mode=execute.
++#
++# However slibtool currently has a bug where the destination argument is dropped
++# which will result in the command failing.
++#
++# See https://bugs.gentoo.org/790770
++
++set -eu
++
++cp "${1}" ../../../bin
+diff --git a/src/tools/ta_regtest/Makefile.am b/src/tools/ta_regtest/Makefile.am
+index 64229e2..255a87e 100644
+--- a/src/tools/ta_regtest/Makefile.am
++++ b/src/tools/ta_regtest/Makefile.am
+@@ -34,5 +34,5 @@ ta_regtest_CPPFLAGS = -I../../ta_func \
+ 		      -I../../ta_common/mt \
+ 		      -I../../ta_common \
+ 		      -I../../ta_abstract
+-ta_regtest_LDFLAGS = -L../.. -lta_lib \
+-		     -lm
++ta_regtest_LDFLAGS = -no-undefined
++ta_regtest_LDADD = ../../libta_lib.la $(LIBM)
+-- 
+2.35.1
+
diff --git a/sci-libs/ta-lib/ta-lib-0.4.0-r1.ebuild b/sci-libs/ta-lib/ta-lib-0.4.0-r1.ebuild
new file mode 100644
index 000000000000..1b9203041c43
--- /dev/null
+++ b/sci-libs/ta-lib/ta-lib-0.4.0-r1.ebuild
@@ -0,0 +1,41 @@
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit autotools
+
+DESCRIPTION="Technical Analysis Library for analyzing financial markets trends"
+HOMEPAGE="https://www.ta-lib.org/"
+SRC_URI="mirror://sourceforge/ta-lib/${P}-src.tar.gz"
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~amd64 ~x86"
+
+S="${WORKDIR}/${PN}"
+
+PATCHES=(
+	"${FILESDIR}"/${P}-asneeded.patch
+	"${FILESDIR}"/${P}-slibtool.patch # 790770
+)
+
+src_prepare() {
+	default
+
+	eautoreconf
+}
+
+src_configure() {
+	econf --disable-static
+}
+
+src_test() {
+	src/tools/ta_regtest/ta_regtest || die
+}
+
+src_install() {
+	default
+
+	find "${D}" -name '*.la' -delete || die
+}