tests/mansyntax.sh: fix 'make distcheck' with recent autotools

Do not create symbolic links off the build directory.  Recent autotools
verify that out-of-source build works even if the source directory tree
is not writable.

tests/CMakeLists.txt

@@ -78,8 +78,9 @@ find_program(MAN_EXECUTABLE man)
 find_program(GREP_EXECUTABLE grep)
 mark_as_advanced(SH_EXECUTABLE MAN_EXECUTABLE GREP_EXECUTABLE)
 if(SH_EXECUTABLE AND MAN_EXECUTABLE AND GREP_EXECUTABLE)
-  add_test(mansyntax
-    ${SH_EXECUTABLE} "${CMAKE_CURRENT_SOURCE_DIR}/mansyntax.sh")
+  set(cmd "srcdir=${CMAKE_CURRENT_SOURCE_DIR}")
+  set(cmd "${cmd} ${CMAKE_CURRENT_SOURCE_DIR}/mansyntax.sh")
+  add_test(mansyntax ${SH_EXECUTABLE} -c "${cmd}")
 endif()
 
 add_test(simple test-simple)
@@ -107,4 +108,4 @@ if(SSHD_EXECUTABLE AND CHMOD_EXECUTABLE AND KILL_EXECUTABLE)
     ${CMAKE_CURRENT_BINARY_DIR}/test-${TEST_NAME}_fixture.sh
     $<TARGET_FILE:test-${TEST_NAME}>)
 
-endif()
+endif()

tests/Makefile.am

@@ -14,6 +14,7 @@ endif
 check_PROGRAMS = $(ctests)
 
 TESTS_ENVIRONMENT = SSHD=$(SSHD) EXEEXT=$(EXEEXT)
+TESTS_ENVIRONMENT += srcdir=$(top_srcdir)/tests builddir=$(top_builddir)/tests
 
 EXTRA_DIST = ssh2.sh mansyntax.sh
 EXTRA_DIST += etc/host etc/host.pub etc/user etc/user.pub

tests/mansyntax.sh

@@ -6,7 +6,8 @@ set -e
 # Run syntax checks for all manpages in the documentation tree.
 #
 
-srcdir="`cd $(dirname $0);pwd`"
+srcdir=${srcdir:-$PWD}
+dstdir=${builddir:-$PWD}
 mandir=${srcdir}/../docs
 
 #
@@ -19,13 +20,13 @@ fi
 
 ec=0
 
-trap "rm -f $srcdir/man3" EXIT
+trap "rm -f $dstdir/man3" EXIT
 
-ln -sf "$mandir" "$srcdir/man3"
+ln -sf "$mandir" "$dstdir/man3"
 
 for manpage in $mandir/libssh2_*.*; do
   echo "$manpage"
-  warnings=$(LANG=en_US.UTF-8 MANWIDTH=80 man -M "$srcdir" --warnings \
+  warnings=$(LANG=en_US.UTF-8 MANWIDTH=80 man -M "$dstdir" --warnings \
     -E UTF-8 -l "$manpage" 2>&1 >/dev/null)
   if [ -n "$warnings" ]; then
     echo "$warnings"