[FE training-materials-updates] slides/autotools-advanced: more details about variables

[Thomas Petazzoni]

Repository : git://git.free-electrons.com/training-materials.git

On branch  : master
Link       : http://git.free-electrons.com/training-materials/commit/?id=5b95f552d1f171a80f207815161a01a58c7a70b1

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commit 5b95f552d1f171a80f207815161a01a58c7a70b1
Author: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Date:   Wed May 20 14:56:23 2015 +0200

    slides/autotools-advanced: more details about variables
    
    Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>


>---------------------------------------------------------------

5b95f552d1f171a80f207815161a01a58c7a70b1
 slides/autotools-advanced/autotools-advanced.tex | 38 +++++++++++++++++++++++-
 1 file changed, 37 insertions(+), 1 deletion(-)

diff --git a/slides/autotools-advanced/autotools-advanced.tex b/slides/autotools-advanced/autotools-advanced.tex
index 5f8f012..7b8edb3 100644
--- a/slides/autotools-advanced/autotools-advanced.tex
+++ b/slides/autotools-advanced/autotools-advanced.tex
@@ -845,7 +845,11 @@ $ find /tmp/test
 \begin{frame}[fragile]{Global {\em automake} variables}
 
   \begin{itemize}
-  \item Apply to the current \code{Makefile.am}
+  \item Variables that you can define in \code{Makefile.am}
+    \begin{itemize}
+    \item Apply to the current \code{Makefile.am}
+    \item Affect all products described in the current \code{Makefile.am}
+    \end{itemize}
   \item \code{AM_CPPFLAGS}, default pre-processor flags
   \item \code{AM_CFLAGS}, default compiler flags
   \item \code{AM_LDFLAGS}, default linker flags
@@ -887,6 +891,38 @@ slice_threadinit_LDADD = $(top_builddir)/gthread/libgthread-2.0.la $(LDADD)
   \end{block}
 \end{frame}
 
+\begin{frame}[fragile]{Useful variables}
+
+  \begin{itemize}
+
+  \item Autoconf provides several variables that can be useful in your
+    \code{Makefile.am}:
+
+    \begin{itemize}
+
+    \item \code{top_srcdir}, the relative path to the top of the source tree
+    \item \code{srcdir}, the relative path to the directory that contains the current \code{Makefile}
+    \item \code{top_builddir}, the relative path to the top of the build tree
+    \item \code{builddir}, the current directory
+    \item \code{abs_top_srcdir}, \code{abs_srcdir},
+      \code{abs_top_builddir}, \code{abs_builddir}, absolute variants
+      of the previous variables
+    \end{itemize}
+
+  \item Example usage: library code in \code{lib/}, header files in
+    \code{include/}:
+    \begin{block}{lib/Makefile.am}
+    \begin{minted}[fontsize=\scriptsize]{make}
+lib_LTLIBRARIES = libhello.la
+libhello_la_SOURCES = ...
+libhello_la_CPPFLAGS = -I$(top_srcdir)/include
+\end{minted}
+\end{block}
+
+  \end{itemize}
+
+\end{frame}
+
 \begin{frame}[fragile]{Silent rules}
 
   \begin{itemize}