Fix build: make dep, disable lto/buildflags/makeflags

Currently we cannot build even old versions due to broken dependencies
in the TITAN's hand-written Makefiles.  Making the 'dep' target first
helps to overcome the majority of them, but it still does not compile
due to various compilation errors.

Disabling 'lto' was recommended by the project maintainers [1].  I also
had to disable '{build,make}flags' to overcome the compilation errors
and make-loops (endlessly making the same subdir).

[1] https://gitlab.eclipse.org/eclipse/titan/titan.core/-/issues/595

2 files changed, 18 insertions, 3 deletions

diff --git a/.SRCINFO b/.SRCINFO
index 5058ce36f06f..3f4184074dab 100644
--- a/.SRCINFO
+++ b/.SRCINFO
@@ -15,6 +15,9 @@ pkgbase = titan-git
 	depends = ncurses
 	depends = openssl
 	depends = jdk8-openjdk
+	options = !lto
+	options = !buildflags
+	options = !makeflags
 	source = git+https://gitlab.eclipse.org/eclipse/titan/titan.core.git
 	source = titan.profile
 	md5sums = SKIP
diff --git a/PKGBUILD b/PKGBUILD
index a93aaa9d2aed..77091f0cb15e 100644
--- a/PKGBUILD
+++ b/PKGBUILD
@@ -31,11 +31,23 @@ pkgver() {
     git describe --long --tags | sed 's/\([^-]*-g\)/r\1/;s/-/./g'
 }
 
+# Currently we cannot build even old versions due to broken dependencies in
+# the TITAN's hand-written Makefiles.  Building the 'dep' target first helps
+# to overcome the majority of them, but it still does not compile due to
+# various compilation errors.  Disabling 'buildflags' and 'makeflags' helps.
+# See also https://gitlab.eclipse.org/eclipse/titan/titan.core/-/issues/595.
+options=(!lto !buildflags !makeflags)
+
+prepare() {
+    cd $srcdir/$_pkgname
+    echo "TTCN3_DIR := /usr/ttcn3" >> Makefile.personal
+    echo "JDKDIR := /usr/lib/jvm/java-8-openjdk" >> Makefile.personal
+}
+
 build() {
     cd $srcdir/$_pkgname
-    make \
-        TTCN3_DIR=/usr/ttcn3 \
-        JDKDIR=/usr/lib/jvm/java-8-openjdk
+    make dep
+    make
 }
 
 package() {