[librsvg/hospitality: 6/12] Makefile.am: Refactor some variable substitutions

[Federico Mena Quintero <federico src gnome org>]

commit d55929b1fa6cf596ed512ddc2d7336d1a31ae835
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Nov 30 08:32:08 2017 -0600

    Makefile.am: Refactor some variable substitutions

 Makefile.am |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 36d58ad..b8a17b0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -119,14 +119,15 @@ cargo_verbose_0 =
 cargo_verbose_1 = --verbose
 
 RUST_LIB=@abs_top_builddir@/rust/target/@RUST_TARGET_SUBDIR@/librsvg_internals.a
+CARGO_TARGET_DIR=@abs_top_builddir@/rust/target
 
 check-local:
        cd $(srcdir)/rust && \
-       CARGO_TARGET_DIR=@abs_top_builddir@/rust/target cargo test
+       CARGO_TARGET_DIR=$(CARGO_TARGET_DIR) cargo test
 
 clean-local:
        cd $(top_srcdir)/rust && \
-       CARGO_TARGET_DIR=@abs_top_builddir@/rust/target cargo clean
+       CARGO_TARGET_DIR=$(CARGO_TARGET_DIR) clean
 
 dist-hook:
        (cd $(distdir)/rust && \
@@ -138,7 +139,7 @@ $(RUST_LIB): $(RUST_SOURCES)
        +cd $(top_srcdir)/rust &&                                               \
        PKG_CONFIG_ALLOW_CROSS=1                                                \
        PKG_CONFIG='$(PKG_CONFIG)'                                              \
-       CARGO_TARGET_DIR=@abs_top_builddir@/rust/target                         \
+       CARGO_TARGET_DIR=$(CARGO_TARGET_DIR)                                    \
        cargo build $(CARGO_VERBOSE) $(CARGO_TARGET_ARGS) $(CARGO_RELEASE_ARGS)
 
 librsvg_@RSVG_API_MAJOR_VERSION@_la_CPPFLAGS = \