check libtool improved

.travis.yml

@@ -12,7 +12,7 @@ before_install: ./install-deps.sh
 script:
   - ./autogen.sh
   - export CC=gcc
-  - if [ "${TRAVIS_OS_NAME}" = osx ]; then gcc -v; gcc-9 -v; export CC=gcc-9; fi
+  - if [ "${TRAVIS_OS_NAME}" = osx ]; then gcc -v; gcc-9 -v; export CC=gcc-9; export PATH="/usr/local/opt/texinfo/bin:/Library/TeX/texbin:$PATH"; fi
   - ./configure --enable-lib CC="$CC $M32"
   - make
   - for i in misc r8c 8086 c165; do ./build-ec $i; done

INSTALL.md

@@ -3,13 +3,14 @@
 
     git clone https://git.savannah.gnu.org/git/gforth.git
     cd gforth
-    ./install-deps.sh # install all known dependencies for a full build
+    . ./install-deps.sh # install all known dependencies for a full build
     ./BUILD-FROM-SCRATCH
     sudo make install
 
 ## Additional info for MacOS ##
 
-You'll get brew installed if it is not already there.
+You'll get brew and XCode command line tools installed (git will trigger the
+latter) if it is not already there.  The install-deps.sh
 
 ## Alternative: Build from Tarball
 If you are building from the tarball, please consult [INSTALL](INSTALL).

configure.ac

@@ -1130,9 +1130,9 @@ fi
 AC_SUBST(LIB_SUFFIX)
 AC_CHECK_LIB(rt,clock_gettime)
 
-if test -n "GNU_LIBTOOL" -a $ac_cv_lib_ltdl_lt_dlinit = yes; then
+if test -n "$GNU_LIBTOOL" -a "x$ac_cv_lib_ltdl_lt_dlinit" = xyes; then
   build_libcc_named=build-libcc-named
-elif test -n "GNU_LIBTOOL" -a $ac_cv_func_dlopen = yes; then
+elif test -n "$GNU_LIBTOOL" -a "x$ac_cv_func_dlopen" = xyes; then
   build_libcc_named=build-libcc-named
 else
   AC_MSG_WARN([No LIBTOOL found, skip pre-building libcc-based libraries])

install-deps.sh

@@ -43,6 +43,7 @@ install_osx() {
   brew cask install xquartz mactex
   export PATH="/Library/TeX/texbin:$PATH"
   brew link --overwrite gcc
+  export CC=gcc-9
 #  (cd /usr/local/Cellar/gcc/8.2.0/lib/gcc/8/gcc/x86_64-apple-darwin17.7.0/8.2.0/include-fixed && mv stdio.h stdio.h.botched)
 }